Linux运维工程师-面试题总结

1.linux 如何挂在 windows 下的共享目录

mount.cifs //192.168.1.3/server /mnt/server -o user=administrator,pass=123456

linux 下的 server 需要自己手动建一个  后面的 user 与 pass 是 windows 主机的账号和密码 注意空格 和逗号

2.查看 http 的并发请求数与其 TCP 连接状态

      [root@localhost ~]# netstat -n | awk ‘/^tcp/ {b[$NF]++} END{for(a in b)print a,b[a]}'<p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">还有 ulimit -n 查看 linux 系统打开最大的文件描述符，这里默认 1024，不修改这里 web 服务器修改再大也没用。若要用就修改有几个办法，这里说其中一个：</p><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">修改/etc/security/limits.conf</p><div class="crayon-syntax crayon-theme-solarized-dark crayon-font-consolas crayon-os-pc print-yes notranslate" style="font-family:Monaco, MonacoRegular, 'Courier New', monospace;margin:12px 0px;padding:0px;vertical-align:baseline;text-align:left;width:814.062px;color:rgb(68,68,68);height:auto;border-width:1px;border-style:solid;border-color:rgb(153,153,153);font-size:14px;background:rgb(0,43,54);line-height:16px;"><div class="crayon-toolbar" style="border-top:0px;border-right:0px;border-left:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;width:812.062px;border-bottom:1px solid rgb(187,187,187);font-family:Consolas, ConsolasRegular, 'Courier New', monospace;background:rgb(221,221,221);height:21px;line-height:21px;"><span class="crayon-title" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 4px;vertical-align:baseline;color:rgb(51,51,51);float:left;height:inherit;"></span><div class="crayon-tools" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;height:21px;line-height:21px;float:right;"><div class="crayon-button crayon-plain-button" title="Toggle Plain Code" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -48px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -112px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-copy-button" title="Copy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -16px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px 0px;width:24px;height:16px;"></div></div><span class="crayon-language" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 8px 0px 4px;vertical-align:baseline;color:rgb(153,153,153);float:left;height:inherit;">Shell</span></div></div><div class="crayon-plain-wrap" style="border:0px;font-style:inherit;vertical-align:baseline;background:0px center;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;height:auto;"></div><div class="crayon-main" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;width:812.062px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;"><table class="crayon-table" style="font-size:12px;font-style:inherit;margin-left:0px;vertical-align:baseline;border:none;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;border-spacing:0px;background:none;width:auto;table-layout:auto;"><tbody style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;"><tr class="crayon-row" style="font-style:inherit;background:0px center;border-style:none;margin:0px;padding:0px;vertical-align:top;"><td class="crayon-nums" style="border-width:0px;font-size:12px;font-style:inherit;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;background:rgb(7,54,66);color:rgb(88,110,117);"><div class="crayon-nums-content" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;white-space:nowrap;font-size:14px;line-height:16px;"><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">1</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">2</div></div></td><td class="crayon-code" style="border-width:0px;font-size:12px;font-style:inherit;background:0px center;width:794px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;"><div class="crayon-pre" style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;color:rgb(0,0,0);white-space:pre;border:none;font-size:14px;background:none;line-height:16px;"><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">*</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">soft </span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">nofile</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">10240</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">*</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">hard </span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">nofile</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">10240</span></div></div></td></tr></tbody></table></div></div><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">重启后生效</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t2"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">3.用 tcpdump 嗅探 80 端口的访问看看谁最高</span></h3><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">tcpdump -i eth0 -tnn dst port 80 -c 1000</p><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">tcpdump -i eth0 -tnn dst port 80 -c 1000 | awk -F"." '{print $1"."$2"."$3"."$4}' | sort | uniq -c | sort -nr |head -5&amp;nbsp;</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t3"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">4.查看/var/log 目录下文件数</span></h3><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">ls /var/log/ -lR| grep "^-" |wc -l</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t4"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">5.查看当前系统每个 IP 的连接数</span></h3><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">netstat -antup | awk '/^tcp/ {print $5}'| awk -F: '{print $1}' | sort | uniq -c | sort -rn</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t5"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">6.shell 下 32 位随机密码生成</span></h3><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">cat /dev/urandom | head -1 | md5sum | head -c 32 &gt;&gt; /pass<br></p><p style="border:0px;font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;font-size:15px;margin-bottom:5px;vertical-align:baseline;text-indent:2em;color:rgb(68,68,68);background-color:rgb(255,255,255);">将生成的 32 位随机数 保存到/pass 文件里了</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t6"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">7.统计出 apache 的 access_log 中访问量最多的 5 个 IP</span></h3><p>&nbsp; &nbsp; &nbsp; cat access_log | awk &nbsp;'{print $1}' | sort | uniq -c | sort -n -r | head -5</p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:'Microsoft YaHei', Helvetica, Arial, 'Lucida Grande', Tahoma, sans-serif;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;color:rgb(68,68,68);background-color:rgb(255,255,255);"><a name="t7"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">8.在 1-39 内取随机数</span></h3>&nbsp; &nbsp; &nbsp;&nbsp;echo$[RANDOM%39+1]

9.Linux 系统的开机启动顺序

加载 BIOS–>读取 MBR–>Boot Loader–>加载内核–>用户层 init 一句 inittab 文件来设定系统运行的等级(一般 3 或者 5，3 是多用户命令行，5 是界面)–>init 进程执行 rc.syninit–>启动内核模块–>执行不同级别运行的脚本程序–>执行/etc/rc.d/rc.local(本地运行服务)–>执行/bin/login,就可以登录了。

10.符号链接与硬链接的区别

我们可以把符号链接，也就是软连接 当做是 windows 系统里的 快捷方式。

硬链接 就好像是 又复制了一份.

ln 3.txt 4.txt   这是硬链接，相当于复制，不可以跨分区，但修改 3,4 会跟着变，若删除 3,4 不受任何影响。

ln -s 3.txt 4.txt  这是软连接，相当于快捷方式。修改 4,3 也会跟着变，若删除 4,3 就坏掉了。不可以用了。

11.显示/etc/inittab 中以#开头，且后面跟了一个或者多个空白字符，而后又跟了任意非空白字符的行

grep “^# \{1,\}[^ ]” /etc/inittab 

12.显示/etc/inittab 中包含了:一个数字:(即两个冒号中间一个数字)的行

grep “\:[0-9]\{1\}\:” /etc/inittab

13.怎么把脚本添加到系统服务里，即用 service 来调用

在脚本里加入

Shell

1 2 3

#!/bin/bash # chkconfig: 345 85 15 # description: httpd

然后保存

chkconfig httpd –add  创建系统服务

现在就可以使用 service 来 start or restart

14.写一个脚本，实现批量添加 20 个用户，用户名为 user01-20，密码为 user 后面跟 5 个随机字符

Shell

1 2 3 4 5 6

#!/bin/bash #description: useradd for i in `seq -f“%02g” 1 20`;do useradd user$i</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"user$i:`echo $RANDOM|md5sum|cut -c 1-5`”|passwd –stdinuser$i</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">2</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">done</span></div></div></td></tr></tbody></table></div></div><p style="font-size:15px;border:0px;font-family:inherit;font-style:inherit;margin-bottom:5px;vertical-align:baseline;text-indent:2em;"></p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:inherit;font-style:inherit;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;"><a name="t14"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">15.写一个脚本，实现判断 192.168.1.0/24 网络里，当前在线的 IP 有哪些，能 ping 通则认为在线</span></h3><div class="crayon-syntax crayon-theme-solarized-dark crayon-font-consolas crayon-os-pc print-yes notranslate" style="font-size:14px;font-family:Monaco, MonacoRegular, 'Courier New', monospace;font-style:inherit;margin:12px 0px;padding:0px;vertical-align:baseline;width:814.062px;height:auto;border-width:1px;border-style:solid;border-color:rgb(153,153,153);background:rgb(0,43,54);line-height:16px;"><div class="crayon-toolbar" style="border-top:0px;border-right:0px;border-left:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;width:812.062px;border-bottom:1px solid rgb(187,187,187);font-family:Consolas, ConsolasRegular, 'Courier New', monospace;background:rgb(221,221,221);height:21px;line-height:21px;"><span class="crayon-title" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 4px;vertical-align:baseline;color:rgb(51,51,51);float:left;height:inherit;"></span><div class="crayon-tools" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;height:21px;line-height:21px;float:right;"><div class="crayon-button crayon-plain-button" title="Toggle Plain Code" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -48px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -112px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-copy-button" title="Copy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -16px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px 0px;width:24px;height:16px;"></div></div><span class="crayon-language" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 8px 0px 4px;vertical-align:baseline;color:rgb(153,153,153);float:left;height:inherit;">Shell</span></div></div><div class="crayon-plain-wrap" style="border:0px;font-style:inherit;vertical-align:baseline;background:0px center;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;height:auto;"></div><div class="crayon-main" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;width:812.062px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;"><table class="crayon-table" style="font-size:12px;font-style:inherit;margin-left:0px;vertical-align:baseline;border:none;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;border-spacing:0px;background:none;width:auto;table-layout:auto;"><tbody style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;"><tr class="crayon-row" style="font-style:inherit;background:0px center;border-style:none;margin:0px;padding:0px;vertical-align:top;"><td class="crayon-nums" style="border-width:0px;font-size:12px;font-style:inherit;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;background:rgb(7,54,66);color:rgb(88,110,117);"><div class="crayon-nums-content" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;white-space:nowrap;font-size:14px;line-height:16px;"><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">1</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">2</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">3</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">4</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">5</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">6</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">7</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">8</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">9</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">10</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">11</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">12</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">13</div></div></td><td class="crayon-code" style="border-width:0px;font-size:12px;font-style:inherit;background:0px center;width:786px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;"><div class="crayon-pre" style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;color:rgb(0,0,0);white-space:pre;border:none;font-size:14px;background:none;line-height:16px;"><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-p" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">#!/bin/bash</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">for</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">ip</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">in</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">seq</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">255</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">do</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">{</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">ping</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">c</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">192.168.1.</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$ip</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">2</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">if</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">$</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">?</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">eq</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">0</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">then</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">192.168.1.</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$ip</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">UP</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">else</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">192.168.1.</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$ip</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">DOWN</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">fi</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp; </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">}</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">done</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">wait</span></div></div></td></tr></tbody></table></div></div><p style="font-size:15px;border:0px;font-family:inherit;font-style:inherit;margin-bottom:5px;vertical-align:baseline;text-indent:2em;"></p><h3 style="border-width:0px 0px 0px 5px;border-left-style:solid;border-left-color:rgb(47,136,154);font-family:inherit;font-style:inherit;margin:2px -21px 10px;padding:0px 44px;vertical-align:baseline;line-height:30.4px;"><a name="t15"></a><span style="border:0px;font-family:inherit;font-size:16px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;">16.写一个脚本，判断一个指定的脚本是否是语法错误；如果有错误，则提醒用户键入 Q 或者 q 无视错误并退出其它任何键可以通过 vim 打开这个指定的脚本</span></h3><div class="crayon-syntax crayon-theme-solarized-dark crayon-font-consolas crayon-os-pc print-yes notranslate" style="font-size:14px;font-family:Monaco, MonacoRegular, 'Courier New', monospace;font-style:inherit;margin:12px 0px;padding:0px;vertical-align:baseline;width:814.062px;height:auto;border-width:1px;border-style:solid;border-color:rgb(153,153,153);background:rgb(0,43,54);line-height:16px;"><div class="crayon-toolbar" style="border-top:0px;border-right:0px;border-left:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;width:812.062px;border-bottom:1px solid rgb(187,187,187);font-family:Consolas, ConsolasRegular, 'Courier New', monospace;background:rgb(221,221,221);height:21px;line-height:21px;"><span class="crayon-title" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 4px;vertical-align:baseline;color:rgb(51,51,51);float:left;height:inherit;"></span><div class="crayon-tools" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;height:21px;line-height:21px;float:right;"><div class="crayon-button crayon-plain-button" title="Toggle Plain Code" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -48px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -112px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-copy-button" title="Copy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -16px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px 0px;width:24px;height:16px;"></div></div><span class="crayon-language" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 8px 0px 4px;vertical-align:baseline;color:rgb(153,153,153);float:left;height:inherit;">Shell</span></div></div><div class="crayon-plain-wrap" style="border:0px;font-style:inherit;vertical-align:baseline;background:0px center;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;height:auto;"></div><div class="crayon-main" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;width:812.062px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;"><table class="crayon-table" style="font-size:12px;font-style:inherit;margin-left:0px;vertical-align:baseline;border:none;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;border-spacing:0px;background:none;width:auto;table-layout:auto;"><tbody style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;"><tr class="crayon-row" style="font-style:inherit;background:0px center;border-style:none;margin:0px;padding:0px;vertical-align:top;"><td class="crayon-nums" style="border-width:0px;font-size:12px;font-style:inherit;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;background:rgb(7,54,66);color:rgb(88,110,117);"><div class="crayon-nums-content" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;white-space:nowrap;font-size:14px;line-height:16px;"><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">1</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">2</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">3</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">4</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">5</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">6</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">7</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">8</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">9</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">10</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">11</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">12</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">13</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">14</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">15</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">16</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">17</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">18</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">19</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">20</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">21</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">22</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">23</div></div></td><td class="crayon-code" style="border-width:0px;font-size:12px;font-style:inherit;background:0px center;width:786px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;"><div class="crayon-pre" style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;color:rgb(0,0,0);white-space:pre;border:none;font-size:14px;background:none;line-height:16px;"><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">root</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">@</span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">localhost&nbsp;&nbsp;</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">tmp</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-c" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(88,110,117);"># cat checksh.sh</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-c" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(88,110,117);">#!/bin/bash</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">read</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">p</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"please input check script-&gt; "</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">file</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">if</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">f</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$file ]; then     sh -n $file</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">2</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">if</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">$? -ne 0 ]; then         read -p “You input $file syntax error,[Type q to exit or Type vim to&nbsp;&nbsp;edit]"</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">answer</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">case</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$answer in         q | Q)            exit 0            ;;         vim )            vim $file</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">*</span>）</div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">exit</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">0</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">esac</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp; </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">fi</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">else</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"$file not exist”     exit 1 fi

17、写一个脚本：(26 包括 3 个小题)

1、创建一个函数，能接受两个参数：

1)第一个参数为 URL，即可下载的文件；第二个参数为目录，即下载后保存的位置；

2)如果用户给的目录不存在，则提示用户是否创建；如果创建就继续执行，否则，函数返回一个 51 的错误值给调用脚本；

3)如果给的目录存在，则下载文件；下载命令执行结束后测试文件下载成功与否；如果成功，则返回 0 给调用脚本，否则，返回 52 给调用脚本；

Shell

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

[root@localhost tmp]# cat downfile.sh #!/bin/bash url=2 download()   {     if [[ ! -d $dir</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">then</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">read</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">p</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"$dir No such directory,create?(y/n)” answer         if [[ “$answer"</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">==</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"y"</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">then</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">mkdir</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">p</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$dir         else             return “51”         fi     fi     cd $dir</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">wget</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$url >/dev/null 2>&1     if [ url $dir</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">$?

18、写一个脚本：（27 包括 2 个小题）

1、创建一个函数，可以接受一个磁盘设备路径（如/dev/sdb）作为参数;在真正开始后面步骤之前提醒用户有危险，并让用户选择是否继续；而后将此磁盘设备上的所有分区清空（提示，使用命令 dd if=/dev/zero of=/dev/sdb bs=512 count=1 实现，注意其中的设备路径不要写错了；

如果此步骤失败，返回 67 给主程序；

接着在此磁盘设备上创建两个主分区，一个大小为 100M，一个大小为 1G；如果此步骤失败，返回 68 给主程序；
格式化此两分区，文件系统类型为 ext3；如果此步骤失败，返回 69 给主程序；

如果上述过程都正常，返回 0 给主程序；

2、调用此函数；并通过接收函数执行的返回值来判断其执行情况，并将信息显示出来；

Shell

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

if [[ -n 1 =~ “/dev/sd[a-z]” ]]; then         local Darray=(`ls /dev/sd[a-z]`)     for i in i” == “$1"</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">Sd</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">=</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$i && break     done else     return 66 fi #当匹配成功，进入选择，告诉用户，是否继续，输错的话进入无限循环，当用户选择Y,则清空目标分区，且跳出while循环 while :;do     read -p “Warning!!!This operation will clean $Sd data.Next=y,Quit=n [y|n]:"</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">Choice</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">case</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$Choice in y)    dd if=/dev/zero of=$Sd</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">bs</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">=</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">512</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">count</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">=</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">1</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">break</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">||</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">return</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">67</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">n</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">)</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp; </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">exit</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">88</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">*</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">)</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">&nbsp;&nbsp; </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"Invalid choice,please choice again."</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">;</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">esac</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">done</span></div></div></td></tr></tbody></table></div></div><p style="font-size:15px;border:0px;font-family:inherit;font-style:inherit;margin-bottom:5px;vertical-align:baseline;text-indent:2em;">#使用 echo 传递给 fdisk 进行分区，如果此命令失败，则跳转出去，错误值 68，需要注意的是，有时候这个返回值很诡异，笔者之前成功与否都是返回的 1，后来重启之后，就好了，如果慎重的话，可以对创建的分区，进行判断，不过就需要使用其他工具截取相关字段了，虽有些小麻烦，但无大碍</p><div class="crayon-syntax crayon-theme-solarized-dark crayon-font-consolas crayon-os-pc print-yes notranslate" style="font-size:14px;font-family:Monaco, MonacoRegular, 'Courier New', monospace;font-style:inherit;margin:12px 0px;padding:0px;vertical-align:baseline;width:814.062px;height:auto;border-width:1px;border-style:solid;border-color:rgb(153,153,153);background:rgb(0,43,54);line-height:16px;"><div class="crayon-toolbar" style="border-top:0px;border-right:0px;border-left:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;width:812.062px;border-bottom:1px solid rgb(187,187,187);font-family:Consolas, ConsolasRegular, 'Courier New', monospace;background:rgb(221,221,221);height:21px;line-height:21px;"><span class="crayon-title" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 4px;vertical-align:baseline;color:rgb(51,51,51);float:left;height:inherit;"></span><div class="crayon-tools" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;height:21px;line-height:21px;float:right;"><div class="crayon-button crayon-plain-button" title="Toggle Plain Code" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -48px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -112px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-copy-button" title="Copy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -16px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px 0px;width:24px;height:16px;"></div></div><span class="crayon-language" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 8px 0px 4px;vertical-align:baseline;color:rgb(153,153,153);float:left;height:inherit;">Shell</span></div></div><div class="crayon-plain-wrap" style="border:0px;font-style:inherit;vertical-align:baseline;background:0px center;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;height:auto;"></div><div class="crayon-main" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;width:812.062px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;"><table class="crayon-table" style="font-size:12px;font-style:inherit;margin-left:0px;vertical-align:baseline;border:none;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;border-spacing:0px;background:none;width:auto;table-layout:auto;"><tbody style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;"><tr class="crayon-row" style="font-style:inherit;background:0px center;border-style:none;margin:0px;padding:0px;vertical-align:top;"><td class="crayon-nums" style="border-width:0px;font-size:12px;font-style:inherit;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;background:rgb(7,54,66);color:rgb(88,110,117);"><div class="crayon-nums-content" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;white-space:nowrap;font-size:14px;line-height:16px;"><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">1</div></div></td><td class="crayon-code" style="border-width:0px;font-size:12px;font-style:inherit;background:0px center;width:794px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;"><div class="crayon-pre" style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;color:rgb(0,0,0);white-space:pre;border:none;font-size:14px;background:none;line-height:16px;"><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">e</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"n\np\n1\n\n+100M\nn\np\n2\n\n+1024M\nw\n"</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">|</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">fdisk</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">sdb</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">||</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">return</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">68</span></div></div></td></tr></tbody></table></div></div><p style="font-size:15px;border:0px;font-family:inherit;font-style:inherit;margin-bottom:5px;vertical-align:baseline;text-indent:2em;">#格式化之前，让内核重新读取磁盘分区表，值得注意的是，有的系统版本，使用 partprobe 无效，譬如笔者的环境是 rhel5.8，而 rhel6.0 以后，这个命令就很危险了，而使用 partx -a /dev/sdb 则效果更好…此项需慎重，如果格式化失败，则告知把失败的分区定义成变量，且跳出函数，并带出错误值 69</p><div class="crayon-syntax crayon-theme-solarized-dark crayon-font-consolas crayon-os-pc print-yes notranslate" style="font-size:14px;font-family:Monaco, MonacoRegular, 'Courier New', monospace;font-style:inherit;margin:12px 0px;padding:0px;vertical-align:baseline;width:814.062px;height:auto;border-width:1px;border-style:solid;border-color:rgb(153,153,153);background:rgb(0,43,54);line-height:16px;"><div class="crayon-toolbar" style="border-top:0px;border-right:0px;border-left:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;width:812.062px;border-bottom:1px solid rgb(187,187,187);font-family:Consolas, ConsolasRegular, 'Courier New', monospace;background:rgb(221,221,221);height:21px;line-height:21px;"><span class="crayon-title" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 4px;vertical-align:baseline;color:rgb(51,51,51);float:left;height:inherit;"></span><div class="crayon-tools" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;height:21px;line-height:21px;float:right;"><div class="crayon-button crayon-plain-button" title="Toggle Plain Code" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -48px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-wrap-button" title="Toggle Line Wrap" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -112px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-copy-button" title="Copy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px -16px;width:24px;height:16px;"></div></div><div class="crayon-button crayon-popup-button" title="Open Code In New Window" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background-position:0px center;background-repeat:no-repeat;height:inherit;line-height:15px;width:24px;background-color:transparent;float:left;"><div class="crayon-button-icon" style="border:0px;font-family:inherit;font-style:inherit;margin:-8px 0px 0px;padding:0px;vertical-align:baseline;background:url(&quot;./images/toolbar/buttons.png?ver=20170826&quot;) 0px 0px;width:24px;height:16px;"></div></div><span class="crayon-language" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 8px 0px 4px;vertical-align:baseline;color:rgb(153,153,153);float:left;height:inherit;">Shell</span></div></div><div class="crayon-plain-wrap" style="border:0px;font-style:inherit;vertical-align:baseline;background:0px center;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;height:auto;"></div><div class="crayon-main" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;width:812.062px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;"><table class="crayon-table" style="font-size:12px;font-style:inherit;margin-left:0px;vertical-align:baseline;border:none;margin-top:0px;margin-right:0px;margin-bottom:0px;padding:0px;border-spacing:0px;background:none;width:auto;table-layout:auto;"><tbody style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;"><tr class="crayon-row" style="font-style:inherit;background:0px center;border-style:none;margin:0px;padding:0px;vertical-align:top;"><td class="crayon-nums" style="border-width:0px;font-size:12px;font-style:inherit;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;background:rgb(7,54,66);color:rgb(88,110,117);"><div class="crayon-nums-content" style="border:0px;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;background:0px center;white-space:nowrap;font-size:14px;line-height:16px;"><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">1</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">2</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">3</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">4</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">5</div><div class="crayon-num crayon-striped-num" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;text-align:center;height:inherit;border-width:1px;border-color:rgb(204,204,204);">6</div><div class="crayon-num" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;text-align:center;height:inherit;">7</div></div></td><td class="crayon-code" style="border-width:0px;font-size:12px;font-style:inherit;background:0px center;width:794px;font-family:Consolas, ConsolasRegular, 'Courier New', monospace;margin:0px;padding:0px;vertical-align:top;"><div class="crayon-pre" style="font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;color:rgb(0,0,0);white-space:pre;border:none;font-size:14px;background:none;line-height:16px;"><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">partprobe</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">Part</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">=</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">fdisk</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">l</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$Sd</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">|</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">tail</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">2</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">|</span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">cut</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">d</span>”<span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span>”<span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">f1</span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">`</span></div><div class="crayon-line" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;background:0px center;height:inherit;"><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">for</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-e" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">M</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-st" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">in</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">${Part};do    mke2fs -j $M</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&gt;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">dev</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">/</span><span class="crayon-t" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(181,137,0);">null</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">ErrorPart</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">=</span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$M &&return 69 done   return 0 }

#下面代码，调用函数，接收函数返回值，根据返回值进行判断哪里出错。

Shell

1 2 3 4 5 6 7

Disk_Mod ? [ $Res</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">eq</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">0</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">exit</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">0</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$Res-eq 66 ] && echo “Error! Invalid input.” [ $Res</span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">-</span><span class="crayon-i" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(131,148,150);">eq</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-cn" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">67</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">]</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-o" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(133,153,0);">&amp;&amp;</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-r" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(203,75,22);">echo</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-s" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(42,161,152);">"Error! Command -&gt; dd &lt;- Faild."</span></div><div class="crayon-line crayon-striped-line" style="font-family:inherit;font-style:inherit;margin:0px;padding:0px 5px;vertical-align:baseline;height:inherit;border-width:1px;border-color:rgb(204,204,204);"><span class="crayon-sy" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);">[</span><span class="crayon-h" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(220,50,47);"> </span><span class="crayon-v" style="border:0px;font-family:inherit;font-style:inherit;margin:0px;padding:0px;vertical-align:baseline;height:inherit;color:rgb(38,139,210);">$Res-eq 68 ] && echo “Error! Command -> fdisk <- Faild.” [ $Res-eq 69 ] && echo “Error! Command -> mke2fs <- Faild.”