本文提供了一系列针对Linux系统的优化及管理脚本，包括数据库备份、简易跳板机搭建、一键系统优化、服务监控与管理等实用脚本。这些脚本能够帮助系统管理员高效完成日常任务。
2017/9/4
msyql数据库分库备份
1 #!/usr/bin/env bash 2 # 3 4 #Author : JACK ZHAO 5 #Date : 2017/09/25 6 #Descriptions : Database repository backup 7 8 USERNAME=root 9 PASSWD=oldboy123 10 MYDUMP=/application/mysql/bin/mysqldump 11 SOCK=/data/3306/mysql.sock 12 export PATH=/application/mysql/bin:$PATH 13 14 . /etc/init.d/functions 15 16 [ -e /data/backup ] || mkdir -p /data/backup 17 DB=`/application/mysql/bin/mysql -u$USERNAME -p$PASSWD -S $SOCK -e "show databases;" | grep -iEv "mysql|Database|infor|perfor"` 18 for i in `echo $DB`;do 19 $MYDUMP -u$USERNAME -p$PASSWD -S $SOCK --default-character-set=latin1 --events -B $i | gzip -9 > /data/backup/${i}_`date +%F`.gz 20 if [ $? -eq 0 ];then 21 action "$i succeed. /data/backup/${i}_`date +%F`.gz" /bin/true 22 else 23 action "$i failed." /bin/false 24 fi 25 done 26 坑点：如果加载了. /etc/init.d/functions，在脚本中不能用直接用mysql,而要使用全路径，原因不详，可能因为functions中使用mysql
2017/9/3
简易跳板机
1 1）首先做好SSH密钥验证（跳板机地址192.168.33.128）。 2 以下操作命令在所有机器上操作： 3 [root@mylab3 ~]# useradd jumper #<==要在所有机器上操作。 4 以下操作命令仅在跳板机上操作： 5 [root@mylab3 ~]# su - jumper 6 [jump@mylab3 ~]$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa >/dev/null 2>&1 #<==生成密钥对。 7 2)将公钥分发到其他服务器。192.168.0.108 192.168.0.110 192.168.0.200 8 [jump@mylab3 ~]$ ssh-copy-id -i ~/.ssh/id_dsa.pub 192.168.0.108 #<==将公钥分发到其他服务器。 9 The authenticity of host '192.168.0.108 (192.168.0.108)' can't be established. 10 RSA key fingerprint is fd:2c:0b:81:b0:95:c3:33:c1:45:6a:1c:16:2f:b3:9a. 11 Are you sure you want to continue connecting (yes/no)? yes 12 Warning: Permanently added '192.168.0.108' (RSA) to the list of known hosts. 13 jumper@192.168.0.108's password: 14 Now try logging into the machine, with "ssh '192.168.0.108'", and check in: 15 16 .ssh/authorized_keys 17 18 to make sure we haven't added extra keys that you weren't expecting. 19 20 #!/usr/bin/env bash 21 # 22 23 # Author : Jack zhao 24 # Date : 2017/9/22 25 # Descriptsion : Simple jumpe Server. 26 27 while true;do 28 trap ':' INT TSTP TERM EXIT 29 clear 30 cat << EOF 31 ========Jumper Server======== 32 [1] ## 192.168.0.108 33 [2] ## 192.168.0.110 34 [3] ## 192.168.0.200 35 EOF 36 read -p "Please Choose the number [1-3]:" NUM 37 case $NUM in 38 1) 39 echo "Login 192.168.0.108" 40 ssh 192.168.0.108 41 ;; 42 2) 43 echo "Login 192.168.0.110" 44 ssh 192.168.0.110 45 ;; 46 3) 47 echo "Login 192.168.0.200" 48 ssh 192.168.0.200 49 ;; 50 110) 51 read -p "Enter The code of our department for jumper shell:" DEPT 52 if [ "$DEPT" == "646427" ];then 53 exit 0 54 sleep 3 55 else 56 echo "The code is wrong." 57 sleep 2 58 fi 59 ;; 60 *) 61 echo "Please enter a valid number." 62 sleep 2 63 ;; 64 esac 65 done 66 67 #添加至/etc/profile.d,登陆或切换至jumper用户时执行 68 [root@oldboy ~]# echo '[ $UID -ne 0 ] && . /server/scripts/jump.sh' >/etc/profile.d/jump.sh
2017/9/2
Linux一键优化
1.安装系统时精简安装（最小化安装）
2.配置国内高速yum源
3.禁用开机不需要启动的服务
4.优化系统内核参数/etc/sysctl.conf
5.增加系统文件描述符，堆栈等配置
6.禁止root远程登录，修改SSH端口为特殊端口，禁止DNS，空密码
7.有外网IP的机器需要开启配置防火墙，仅对外开启需要提供服务的端口，配置或关闭selinux
8.清除无用的默认系统账户或组（非必须）
9.锁定敏感文件，如/etc/passwd
10.配置服务器和互联网时间同步
11.配置sudo对普通用户权限精细控制
1 #!/usr/bin/env bash 2 # 3 4 # Author : JACK ZHAO 5 # Date : 2017/09/15 6 # Description : Linux simple optimization. 7 8 #####global variables##### 9 export PATH=$PATH 10 RC=0 11 OPTIMIZELOG=/tmp/optimize.log.`date '+%F-%T'` 12 13 #####Precheck##### 14 [ `id -u` -ne 0 ] && echo "Warning:You must run this script as root." && exit 1 15 [ `awk -F "." '{print$1}' /etc/redhat-release | egrep "CentOS release 5|CentOS release 6|CentOS release 7" -c` -ne 1 ] && \ 16 echo "Warining:This script is only suitable for the Centos5/6/7." 17 18 #####stty erase ^H##### 19 /bin/stty erase ^H 20 21 #####set LANG##### 22 export LANG=zh_CN.UTF-8 23 24 #####load functions##### 25 . /etc/init.d/functions 26 27 #####Common functions##### 28 succeed(){ 29 action "$1" /bin/true 30 return 0 31 } 32 33 failed(){ 34 action "$1" /bin/false 35 return 0 36 } 37 38 #####163 yum configuration source##### 39 initYum(){ 40 echo "----->Starting Yum configuration source" | tee -a $OPTIMIZELOG 41 /usr/bin/wget --spider -q http://mirrors.163.com/ 42 RC=$? 43 if [ $RC -eq 0 ];then 44 [ -e /etc/yum.repos.d/CentOS-Base.repo ] && \ 45 mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak.`date +'%F-%T'` -v &>> $OPTIMIZELOG 46 local VERSION=`awk -F "[ .]+" '{print$3}' /etc/redhat-release` 47 if [ $VERSION -eq 5 ];then 48 wget -q -P /etc/yum.repos.d/ http://mirrors.163.com/.help/CentOS5-Base-163.repo 49 elif [ $VERSION -eq 6 ];then 50 wget -q -P /etc/yum.repos.d/ http://mirrors.163.com/.help/CentOS6-Base-163.repo 51 elif [ $VERSION -eq 7 ];then 52 wget -q -P /etc/yum.repos.d/ http://mirrors.163.com/.help/CentOS7-Base-163.repo 53 fi 54 /bin/mv /etc/yum.repos.d/*-Base-163.repo /etc/yum.repos.d/CentOS-Base.repo -v &>> $OPTIMIZELOG 55 yum clean all &>> $OPTIMIZELOG && yum makecache &>> $OPTIMIZELOG 56 echo "#####yum repolist#####" | tee -a $OPTIMIZELOG 57 yum repolist | tee -a $OPTIMIZELOG 58 fi 59 if [ $RC -eq 0 ];then 60 succeed "Yum configuration source." | tee -a $OPTIMIZELOG 61 else 62 failed "Yum configuration source." | tee -a $OPTIMIZELOG 63 fi 64 return $RC 65 } 66 67 #####Streamline startup daemon services##### 68 initService(){ 69 echo "----->Starting streamline daemon services" | tee -a $OPTIMIZELOG 70 local VERSION=`awk -F "[ .]+" '{print$3}' /etc/redhat-release` 71 if [ $VERSION -eq 5 ] || [ $VERSION -eq 6 ];then 72 echo "#####service crond stop#####" | tee -a $OPTIMIZELOG 73 for i in acpid cpuspeed cups ip6tables ;do 74 /etc/init.d/$i stop | tee -a $OPTIMIZELOG 75 done 76 echo "#####chkconfig off #####" | tee -a $OPTIMIZELOG 77 for i in acpid cpuspeed cups ip6tables bluetooth;do 78 chkconfig $i off 79 echo "chkconfig $i off" | tee -a $OPTIMIZELOG 80 done 81 echo "#####chkconfig --list#####" | tee -a $OPTIMIZELOG 82 export LANG=en_USA.UTF-8 83 chkconfig --list |grep 3:on | tee -a $OPTIMIZELOG 84 export LANG=zh_CN.UTF-8 85 succeed "Starting stramline daemo services." | tee -a $OPTIMIZELOG 86 return 0 87 else 88 failed "Starting stramline daemo services." | tee -a $OPTIMIZELOG 89 return 110 90 fi 91 } 92 93 #####Optimize the system kernel parameters##### 94 initKernel(){ 95 echo "----->Starting optimize system kernel parameters" | tee -a $OPTIMIZELOG 96 [ -w /etc/sysctl.conf ] && mv /etc/sysctl.conf /etc/sysctl.conf.`date +'%F-%T'` 97 cat >>/etc/sysctl.conf<<EOF 98 net.ipv4.tcp_fin_timeout = 2 99 net.ipv4.tcp_tw_reuse = 1 100 net.ipv4.tcp_tw_recycle = 1 101 net.ipv4.tcp_syncookies = 1 102 net.ipv4.tcp_keepalive_time = 600 103 net.ipv4.ip_local_port_range = 4000 65000 104 net.ipv4.tcp_max_syn_backlog = 16384 105 net.ipv4.tcp_max_tw_buckets = 36000 106 net.ipv4.route.gc_timeout = 100 107 net.ipv4.tcp_syn_retries = 1 108 net.ipv4.tcp_synack_retries = 1 109 net.core.somaxconn = 16384 110 net.core.netdev_max_backlog = 16384 111 net.ipv4.tcp_max_orphans = 16384 112 net.netfilter.nf_conntrack_max = 25000000 113 net.netfilter.nf_conntrack_tcp_timeout_established = 180 114 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 115 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 116 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 117 kernel.sysrq = 0 118 kernel.core_uses_pid = 1 119 kernel.msgmnb = 65536 120 kernel.msgmax = 65536 121 kernel.shmmax = 68719476736 122 kernel.shmall = 4294967296 123 EOF 124 cp /etc/rc.local /etc/rc.local.`date '+%F-%T'` 125 modprobe nf_conntrack 126 echo "modprobe nf_conntrack" >> /etc/rc.local 127 modprobe bridge 128 echo "modprobe bridge">> /etc/rc.local 129 echo "#####Kernel Parameters#####" 130 /sbin/sysctl -p | tee -a $OPTIMIZELOG 131 RC_VALUE=$? 132 if [ $RC_VALUE -eq 0 ];then 133 succeed "Optimize the system kernel parameters" | tee -a $OPTIMIZELOG 134 else 135 failed "Optimize the system kernel parameters" | tee -a $OPTIMIZELOG 136 fi 137 return $RC_VALUE 138 } 139 140 #####Add system file descriptors, stacks, and other configurations##### 141 initLimits(){ 142 echo "----->Starting Add system file descriptors" | tee -a $OPTIMIZELOG 143 local VALUES=`grep -v "^#" /etc/security/limits.conf | grep -E "nproc|nofile" | wc -l` 144 if [ -w /etc/security/limits.conf ] && [ $VALUES -eq 0 ];then 145 cp /etc/security/limits.conf /etc/security/limits.conf.`date +'%F-%T'` -v >> $OPTIMIZELOG 146 cat >> /etc/security/limits.conf << EOF 147 * soft nproc 2047 148 * hard nproc 16384 149 * soft nofile 2048 150 * hard nofile 65536 151 EOF 152 source /etc/security/limits.conf 2>/dev/null 153 echo "#####File Descriptors#####" 154 grep -E -v "^#|^$" /etc/security/limits.conf | tee -a $OPTIMIZELOG 155 succeed "Add system file descriptiors" | tee -a $OPTIMIZELOG 156 return 0 157 else 158 failed "Add system file descriptiors" | tee -a $OPTIMIZELOG 159 return 110 160 fi 161 } 162 163 #####Close selinux and iptables##### 164 initFirewall(){ 165 echo "----->Starting Close selinux and clear iptables" 166 /sbin/iptables -F >> $OPTIMIZELOG 167 /etc/init.d/iptables save >> $OPTIMIZELOG 168 local VALUES=`grep -w -c "^SELINUX=diabled" /etc/selinux/config` 169 if [ $VALUES -eq 0 ] && [ -w /etc/selinux/config ];then 170 cp /etc/selinux/config /etc/selinux/config.`date '+%F-%T'` -v >> $OPTIMIZELOG 171 sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config 172 setenforce 0 173 echo "#####Selinux status#####" | tee -a $OPTIMIZELOG 174 echo "Selinux:`getenforce`" | tee -a $OPTIMIZELOG 175 echo "#####Iptables status#####" | tee -a $OPTIMIZELOG 176 /etc/init.d/iptables status | tee -a $OPTIMIZELOG 177 succeed "Close selinux and iptables" | tee -a $OPTIMIZELOG 178 return 0 179 else 180 failed "Close selinux and iptables" | tee -a $OPTIMIZELOG 181 return 110 182 fi 183 } 184 185 #####Clear unused accounts and groups##### 186 initUser(){ 187 echo "----->Starting Clear unused accounts,groups and add user" 188 echo "#####Delete User#####" | tee -a $OPTIMIZELOG 189 for i in lp shutdown halt uucp operator games gopher;do 190 /usr/sbin/userdel -r $i 2>/dev/null || continue 191 echo "Deleted user $i" | tee -a $OPTIMIZELOG 192 done 193 echo "#####Delete Group#####" | tee -a $OPTIMIZELOG 194 for i in lp uucp operator games gopher;do 195 /usr/sbin/groupdel $i 2>/dev/null || continue 196 echo "Deleted group $i" | tee -a $OPTIMIZELOG 197 done 198 echo "#####Add user#####" | tee -a $OPTIMIZELOG 199 grep -q '^user01' /etc/passwd && userdel -r user01 200 useradd user01 201 id user01 | tee -a $OPTIMIZELOG 202 if [ -w /etc/shadow ];then 203 sed -i 's/user01:!!/user01:$1$8tqGkiME$fThWs5EfPyzlxI8F6mq6E1/g' /etc/shadow 204 succeed "Clear unused accounts,groups and add user." | tee -a $OPTIMIZELOG 205 return 0 206 else 207 failed "Add user user01" | tee -a $OPTIMIZELOG 208 return 110 209 fi 210 } 211 212 #####Synchronization time##### 213 initSyncTime(){ 214 echo "----->Starting Synchronization time" 215 local ZONEINFO=`/bin/date -R | awk '{print$NF}'` 216 if [ "$ZONEINFO" != "+0800" ];then 217 /bin/mv /etc/localtime /etc/localtime.`date +'%F-%T'`.bak 218 cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime -v >> $OPTIMIZELOG 219 fi 220 echo "#####Synch Time Aliyum#####" | tee -a $OPTIMIZELOG 221 if [ -e /var/spool/cron/root ];then 222 local NTPDATE=`grep -c "ntpdate" /var/spool/cron/root 2>/dev/null` 223 if [ $NTPDATE -eq 0 ];then 224 cp /var/spool/cron/root /var/spool/cron/root.`date '+%F-%T'` -v >> $OPTIMIZELOG 225 echo "*/5 * * * * /usr/sbin/ntpdate -u time1.aliyun.com &>/dev/null" >> /var/spool/cron/root 226 fi 227 else 228 touch /var/spool/cron/root 229 echo "*/5 * * * * /usr/sbin/ntpdate -u time1.aliyun.com &>/dev/null" >> /var/spool/cron/root 230 fi 231 echo "#####Crontab#####" | tee -a $OPTIMIZELOG 232 /usr/bin/crontab -l | tee -a $OPTIMIZELOG 233 /usr/sbin/ntpdate -u time1.aliyun.com | tee -a $OPTIMIZELOG 234 if [ $? -eq 0 ];then 235 succeed "Synchronization time" | tee -a $OPTIMIZELOG 236 return 0 237 else 238 failed "Synchronization time" | tee -a $OPTIMIZELOG 239 return 110 240 fi 241 } 242 243 #####Configure the sudo permissions for normal users##### 244 initSudo(){ 245 echo "----->Starting Configure sudo permissions for normal users" 246 local VALUES=`grep -c "user01" /etc/sudoers` 247 if [ $VALUES -eq 0 ];then 248 echo "#####Sudo Permissions#####" 249 echo "user01 ALL=(ALL) NOPASSWD: ALL" >>/etc/sudoers 250 grep '^user01' /etc/sudoers | tee -a $OPTIMIZELOG 251 succeed "Confiure the sudo permissions for normal user" | tee -a $OPTIMIZELOG 252 return 0 253 else 254 failed "Confiure the sudo permissions for normal user" | tee -a $OPTIMIZELOG 255 return 110 256 fi 257 } 258 259 #####Modify the system character set as zh_cn.utf-8##### 260 initI18n(){ 261 echo "----->Modify System Character" | tee -a $OPTIMIZELOG 262 local VALUES=`grep -c "zh_cn.utf-8" /etc/sysconfig/i18n` 263 if [ $VALUES -eq 0 ];then 264 mv /etc/sysconfig/i18n /etc/sysconfig/i18n.`date +'%F-%T'`.bak 265 echo "LANG="zh_CN.UTF-8"" >> /etc/sysconfig/i18n | tee -a $OPTIMIZELOG 266 echo "SYSFONT="latarcyrheb-sun16"" >> /etc/sysconfig/i18n | tee -a $OPTIMIZELOG 267 echo "#####LANG#####" 268 source /etc/sysconfig/i18n 269 echo $LANG | tee -a $OPTIMIZELOG 270 succeed "Modify the system character." | tee -a $OPTIMIZELOG 271 return 0 272 else 273 failed "Modify the system character." | tee -a $OPTIMIZELOG 274 return 110 275 fi 276 } 277 278 #####Lock sensitive file##### 279 initChattr(){ 280 echo "----->Starting Lock sensitive file" | tee -a $OPTIMIZELOG 281 echo "#####Lock /etc/passwd#####" | tee -a $OPTIMIZELOG 282 chattr +i /etc/passwd 283 lsattr /etc/passwd | tee -a $OPTIMIZELOG 284 echo "#####Lock /etc/inittb#####" | tee -a $OPTIMIZELOG 285 chattr +i /etc/inittab 286 lsattr /etc/inittab | tee -a $OPTIMIZELOG 287 echo "#####Lock /etc/group#####" | tee -a $OPTIMIZELOG 288 chattr +i /etc/group 289 lsattr /etc/group | tee -a $OPTIMIZELOG 290 echo "#####Lock /etc/shadow#####" | tee -a $OPTIMIZELOG 291 chattr +i /etc/shadow 292 lsattr /etc/shadow | tee -a $OPTIMIZELOG 293 echo "#####Lock /etc/shadow#####" | tee -a $OPTIMIZELOG 294 chattr +i /etc/gshadow 295 lsattr /etc/gshadow | tee -a $OPTIMIZELOG 296 succeed "Lock sensitive file" | tee -a $OPTIMIZELOG 297 return 0 298 } 299 300 #####Modify SSH login port, prohibit root remote login, disable DNS##### 301 initsshd(){ 302 echo "----->Starting configure SSH" | tee -a $OPTIMIZELOG 303 cp /etc/ssh/sshd_config /etc/ssh/sshd_config.`date '+%F-%T'` >> $OPTIMIZELOG 304 echo "#####Set Port 22 TO 52113#####" | tee -a $OPTIMIZELOG 305 sed -i 's/#Port 22/Port 52113/g' /etc/ssh/sshd_config 306 grep "^Port" /etc/ssh/sshd_config | tee -a $OPTIMIZELOG 307 echo "#####NO PermitRootLogin#####" | tee -a $OPTIMIZELOG 308 sed -i 's/#PermitRootLogin yes/PermitRootLogin no/g' /etc/ssh/sshd_config 309 grep "^PermitRootLogin" /etc/ssh/sshd_config | tee -a $OPTIMIZELOG 310 echo "#####NO PermitEmptyPasswords" | tee -a $OPTIMIZELOG 311 sed -i 's/#PermitEmptyPasswords/PermitEmptyPasswords/g' /etc/ssh/sshd_config 312 grep "^PermitEmptyPasswords" /etc/ssh/sshd_config | tee -a $OPTIMIZELOG 313 echo "#####NO UseDNS#####" | tee -a $OPTIMIZELOG 314 sed -i 's/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config 315 grep "^UseDNS" /etc/ssh/sshd_config | tee -a $OPTIMIZELOG 316 /etc/init.d/sshd restart &>/dev/null 317 if [ $? -eq 0 ];then 318 succeed "Configure SSH Service." | tee -a $OPTIMIZELOG 319 return 0 320 else 321 failed "Configure SSH Service." | tee -a $OPTIMIZELOG 322 return 110 323 fi 324 } 325 326 ##### A key optimization##### 327 key(){ 328 initYum 329 initService 330 initKernel 331 initLimits 332 initFirewall 333 initUser 334 initSyncTime 335 initSudo 336 initI18n 337 initChattr 338 initsshd 339 } 340 341 custom(){ 342 while true;do 343 cat << EOF 344 ==============Custom Optimization ====================== 345 [1] ## Yum configuration source 346 [2] ## Streamline system services 347 [3] ## Optimization of the kernel 348 [4] ## Configure Limits 349 [5] ## Configure Firewall 350 [6] ## Configure User 351 [7] ## Sync Time 352 [8] ## Configure Sudo 353 [9] ## Modify System character 354 [10] ## Add chattr File 355 [11] ## Configure SSH 356 [0] ## Return to the upper level 357 ========================================================= 358 EOF 359 read -p "Please select the number:" CHOICE2 360 case $CHOICE2 in 361 1) 362 initYum 363 ;; 364 2) 365 initService 366 ;; 367 3) 368 initKernel 369 ;; 370 4) 371 initLimits 372 ;; 373 5) 374 initFirewall 375 ;; 376 6) 377 initUser 378 ;; 379 7) 380 initSyncTime 381 ;; 382 8) 383 initSudo 384 ;; 385 9) 386 initI18n 387 ;; 388 10) 389 initChattr 390 ;; 391 11) 392 initsshd 393 ;; 394 0) 395 clear 396 mainmeun 397 ;; 398 *) 399 echo "Input invalid please re-enter." 400 for i in `seq 3 -1 1`;do 401 echo -ne "\b\b\b[$i]" 402 sleep 1 403 done 404 clear 405 esac 406 done 407 } 408 409 #####print main meun##### 410 mainmeun(){ 411 while true;do 412 cat << EOF 413 ====================Linux optimization==================== 414 Current time : $CURRENT_TIME 415 IP : $IPINFO 416 Serial Number: $SERIAL_NUMBER 417 CPU Model : $CPU_MODEL 418 Memtotal : $MEMTOTAL 419 DISK : $DISKINFO 420 LOAD AVERAGE : $UPTIMES 421 OS : $OSINFO 422 ========================================================== 423 [1] ## A key to optimize 424 [2] ## Custom optimization 425 [0] ## exit 426 EOF 427 read -p "Please select the number:" CHOICE1 428 case $CHOICE1 in 429 1) 430 echo -e "**********It takes a few minutes to optimize**********" | tee -a $OPTIMIZELOG 431 key 432 echo -e "**********A key optimization is completed**********\n\n" | tee -a $OPTIMIZELOG 433 ;; 434 2) 435 clear 436 custom 437 ;; 438 0) 439 exit 0 440 ;; 441 *) 442 echo "Input invalid please re-enter." 443 for i in `seq 3 -1 1`;do 444 echo -ne "\b\b\b[$i]" 445 sleep 1 446 done 447 clear 448 esac 449 done 450 } 451 452 #####system information##### 453 CURRENT_TIME=`date '+%F %T'` 454 SERIAL=`dmidecode -t 1 | awk -F: '$1 ~ "Serial Number"{print$2}' | sed -r 's/^[[:space:]]+//g'` 455 SERIAL_NUMBER=${SERIAL:-NULL} 456 CPU=`grep "model name" /proc/cpuinfo | awk -F: '{print$2}' | sed 's/ //g'` 457 CPU_MODEL=${CPU:-NULL} 458 MEM=`grep 'MemTotal' /proc/meminfo | awk -F: '{print$2}' | sed -r 's/^[[:space:]]+//g'` 459 MEMTOTAL=${MEM:-NULL} 460 DISK=`fdisk -l | grep "^Disk /dev" | awk -F "[:,]" '{print$2}' | sed -r 's/^[[:space:]]+//g'` 461 DISKINFO=${DISK:-NULL} 462 UPTIME=`uptime | awk -F ":" '{print$NF}' | sed -r 's/^[[:space:]]+//g' ` 463 UPTIMES=${UPTIME:-NULL} 464 OS=`cat /etc/redhat-release` 465 OSINFO=${OS:-NULL} 466 IP=`ip addr show eth0 | grep -w 'inet' | awk -F "[ /]+" '{print$3}'` 467 IPINFO=${IP:-NULL} 468 469 mainmeun
2017/9/1
rsync服务启动脚本
1 #!/usr/bin/env bash 2 # 3 # rsync Bring start/stop rsyncd 4 # 5 # chkconfig: 2345 50 50 6 # description: Start or close the rsync service. 7 8 export PATH=/usr/bin/:$PATH 9 LOCKFILE=/var/lock/subsys/rsync 10 RETURN=0 11 12 . /etc/init.d/functions 13 14 start(){ 15 VALUES=`ss -anlp | grep 873 | wc -l` 16 if [ $VALUES -eq 2 ];then 17 echo "Rsync is running..." 18 else 19 /usr/bin/rsync --daemon --config=/etc/rsyncd.conf 20 RETURN=$? 21 if [ $RETURN -eq 0 ];then 22 action "Starting rsync..." /bin/true 23 [ ! -e $LOCKFILE ] && touch $LOCKFILE 24 else 25 action "Starting rsync..." /bin/false 26 fi 27 fi 28 return $RETURN 29 } 30 31 stop(){ 32 VALUES=`ss -anlp | grep 873 | wc -l` 33 if [ $VALUES -eq 0 ];then 34 echo "Rsync is stopped." 35 else 36 killall rsync &>/dev/null 37 RETURN=$? 38 if [ $? = 0 ];then 39 action "Stopping rsync..." /bin/true 40 [ -e $LOCKFILE ] && rm -f $LOCKFILE 41 else 42 action "Stopping rsync..." /bin/false 43 fi 44 fi 45 return $RETURN 46 } 47 48 status(){ 49 if [ -e $LOCKFILE ];then 50 echo "Rsync is running..." 51 else 52 echo "Rsync is stopped." 53 fi 54 return $VALUES 55 } 56 57 case $1 in 58 start) 59 start 60 ;; 61 stop) 62 stop 63 ;; 64 restart|reload|force-reload) 65 $0 stop 66 sleep 3 67 $0 start 68 RETURN=$? 69 ;; 70 status) 71 status 72 ;; 73 *) 74 echo "Usage: $0 {start|stop|status|reload|force-reload}" 75 exit 2 76 esac 77 exit $RETURN
2017/8/31
mysql启动、关闭
1 #!/usr/bin/env bash 2 # 3 #Author : JACK ZHAO 4 #Date : 2017/9/13 5 #Description : This script is used for mysql to start and stop. 6 7 export PATH=$PATH:/application/mysql/bin/ 8 lockdir=/var/lock/subsys 9 lockfile="$lockdir/mysql" 10 basedir=/application/mysql/bin 11 datadir=/data/3306 12 mysqlpidfile="$datadir/`hostname`.pid" 13 mycnf="$datadir/my.cnf" 14 returnvalue=0 15 16 . /etc/init.d/functions 17 18 mysqlstart(){ 19 [ -e $lockfile ] && echo "MySQL is running..." && exit 0 20 /bin/sh $basedir/mysqld_safe --defaults-file=$mycnf --pid-file=$mysqlpidfile 2>&1 >/dev/null & 21 returnvalue=$? 22 if [ $returnvalue -eq 0 ];then 23 action "Starting MySQL..." /bin/true 24 touch $lockfile 25 else 26 action "Starting MySQL..." /bin/false 27 fi 28 return $retunvalue 29 } 30 31 mysqlstop(){ 32 [ ! -e $mysqlpidfile ] && echo "MySQL is stopped." && return 0 33 mysqlpid=`cat $mysqlpidfile` 34 kill -0 $mysqlpid &>/dev/null 35 returnvalue=$? 36 if [ $returnvalue -eq 0 ];then 37 sleep 2 38 kill $mysqlpid &>/dev/null 39 returnvalue=$? 40 if [ $returnvalue -eq 0 ];then 41 action "Stopping MySQL..." /bin/true 42 else 43 action "Stopping MySQL..." /bin/false 44 fi 45 else 46 action "Mysqld pid non-exists.Stop MySQL..." 47 fi 48 [ -e $lockfile ] && rm -f $lockfile 49 return $returnvalue 50 } 51 52 mysqlstatus(){ 53 if [ -e $lockfile ];then 54 echo "MySQL is running..." 55 else 56 echo "MySQL is stopped." 57 fi 58 return 0 59 } 60 61 usage(){ 62 echo "Usage:sh `basename $0` [start|stop|restart|status]" 63 echo "Description: This script is used for mysql to start, close, and view the state" 64 } 65 66 case $1 in 67 start) 68 mysqlstart 69 ;; 70 stop) 71 mysqlstop 72 ;; 73 restart) 74 mysqlstop 75 sleep 3 76 mysqlstart 77 ;; 78 status) 79 mysqlstatus 80 ;; 81 *) 82 usage 83 exit 1 84 esac 85 exit $returnvalue
2017/8/30
memcache监控状态
1 #!/usr/bin/env bash 2 # 3 4 MEMCACHE_PRO=`netstat -anlp | grep 11212 | wc -l` 5 if [ $MEMCACHE_PRO -eq 2 ];then 6 echo "Memcache is running..." 7 else 8 echo "Memcache is expection." 9 fi
2017/8/29
远程监控mysql
1 #!/usr/bin/env bash 2 # 3 #Author:JACK ZHAO 4 #DATE:2017/9/11 5 #Description:Check the running status of mysql 6 7 mysql -uroot -psf123456 -h 192.168.0.110 –P3306 -e "status" &>/dev/null 8 if [ $? -eq 0 ];then 9 echo "192.168.0.110_Mysql is runnging..." 10 else 11 echo "192.168.0.110_Mysql state exception." 12 fi
2017/8/28
打印杨辉三角
#!/usr/bin/env bash # # Author : Jack zhao # Date : 2017/9/10 # Description: This script is used to printf the Yang hui triangle if [ -z $1 ];then read -p "Please enter a number:" VAR else VAR=$1 fi a[0]=1 for ((i=0;i<=$VAR;i++));do for((j=$i;j>0;j--));do <--由后往前加,到a[0]为止 a[$j]=$[a[$j]+a[$j-1]] done for ((j=0;j<=$i;j++));do echo -n " ${a[$j]}" done echo done
2017/8/27
打印99乘法表
#!/usr/bin/env bash # # Author : Jack zhao # Date : 2017/9/10 # Description: This script is implemented,Yang multiplication table. [ "$1" == "-h" ] || [ "$1" == "--help" ] && echo -e "sh `basename $0` \nDescription:printf Yang multiplication table " && exit 1 declare -i i j for((i=1;i<=9;i++));do for((j=1;j<=$i;j++));do SUM=$[$j*$i] printf "%-8s" "${j}*${i}=${SUM}" done echo done
2017/8/26
1 编写一个名为iffile程序，它执行时判断/bin目录下date文件是否存在？
2 编写一个名为greet的问候程序，它执行时能根据系统当前的时间向用户输出问候信息。设从半夜到中午为早晨，中午到下午六点为下午，下午六点到半夜为晚上。
1 1. 2 #!/usr/bin/env bash 3 # 4 FILE=/bin/date 5 if [ -e "$FILE" ];then 6 echo "$FILE exist." 7 else 8 echo "$FILE Non-existent." 9 fi 10 11 2. 12 #!/usr/bin/env bash 13 # 14 15 CURRENT_TIME=`date +%H` 16 17 18 if [ $CURRENT_TIME -ge 0 -a $CURRENT_TIME -lt 12 ];then 19 echo "Good morning." 20 elif [ $CURRENT_TIME -ge 12 -a $CURRENT_TIME -lt 18 ];then 21 echo "Good afternoon." 22 else 23 echo "Good evening." 24 fi
2017/8/25 写一个shell脚本，检查指定的shell脚本是否有语法错误，若有错误，首先显示错误信息，然后提示用户输入q或者Q退出脚本，输入其他内容则直接用vim打开该shell脚本。提醒： 检查shell脚本有没有语法错误的命令是 sh -n xxx.sh
1 #!/bin/bash 2 # 3 4 # Author : Jack Zhao 5 # DATE : 2017/8/28 6 # Descriptions : This script is used to detect whether other shell scripts have syntax errors 7 8 Usage(){ 9 echo "Usage: `basename $0` [ARG]" 10 echo "Descriptions:This script is used to detect whether other shell scripts have syntax errors" 11 } 12 13 [ $# -lt 1 ] && Usage && exit 1 14 [ $1 == "--help" ] && Usage && exit 0 15 [ ! -e $1 ] && echo "$1 Non-existent." && exit 2 16 17 bash -n $1 2> error.temp 18 19 if [ $? -ne 0 ];then 20 echo -e "\033[31;1m###This script has syntax errors###\033[0m" 21 cat error.temp 22 read -p "Please enter the something[q|Q:exit]:" choice 23 case $choice in 24 q|Q) 25 exit 0 26 ;; 27 *) 28 vim $1 29 ;; 30 esac 31 else 32 echo "$1 There is no syntax error" 33 fi 34 35 rm -rf error.temp
2017/8/24 写一个shell脚本，把192.168.0.0/24网段在线的ip列出来。
思路： for循环， 0.1 -- 0.254 依次去ping，能通说明在线。
1 #!/bin/bash 2 # 3 4 # Author : Jack Zhao 5 # Date : 2017/8/26 6 # Description : This script is used to detect whether the IP address of 192.168.0.0/24 is online 7 8 IP_START=192.168.0 9 GREEN="\033[32m" 10 END="\033[0m" 11 12 usage(){ 13 echo "Usage: sh `basename $0`" 14 echo "Descriptions: This script is used to detect whether the IP address of 192.168.0.0/24 is online" 15 } 16 17 [ "$1" == "--help" ] && usage && exit 0 18 for((i=1;i<=254;i++));do 19 ping ${IP_START}.$i -w 2 -c 2 &> /dev/null 20 if [ $? -eq 0 ];then 21 echo -e "$IP_START.$i ${GREEN}online${END}." 22 fi 23 done
2017/8/23 把一个文本文档中只有一个数字的行给打印出来。
1 #!/bin/bash 2 # Author : Jach zhao 3 # Date : 2017/08/23 4 # Description : This is scripts for gets a single row of Numbers in the file. 5 6 Usage(){ 7 echo "Usage:`basename $0` [ARG] " 8 echo "Descriptin: This is scripts for gets a single row of Number in the file." 9 } 10 11 12 13 [ $# -lt 1 ] && Usage && exit 0 14 [ "$1" == "--help" ] && Usage && exit 0 15 [ ! -e $1 ] && echo "$1 Non-existent,Please check." && exit 1 16 [ ! -r $1 ] && echo "$1 No read permission,Please check." && exit 2 17 18 while read line;do 19 count=`echo -n $line | sed 's@[^[:digit:]]@@g' | wc -c` 20 [ $count -eq 1 ] && echo $line 21 done < $1
2017/8/22 实现一个抽签脚本
1、写一个脚本执行后，输入名字，产生随机数01-99之间的数字。
2、如果相同的名字重复输入，抓到的数字还是第一次抓取的结果，
3、前面已经抓到的数字，下次不能在出现相同数字。
4、第一个输入名字后，屏幕输出信息，并将名字和数字记录到文件里，程序不能退出
继续等待别的学生输入。
1 #!/bin/bash 2 # Author : Jack Zhao 3 # Date : 2017/8/22 4 # Descprition : This script Draw lots between 01 and 100. 5 6 declare -a ARRAY 7 declare -i count=0 8 R="\033[31;1m" 9 N="\033[0m" 10 [ ! -e var_conf.temp ] && touch var_conf.temp 11 12 random_num(){ 13 while true;do 14 LUCKNUM=`echo $RANDOM | awk -F "" '{print$2$3}'` 15 ! `cat var_conf.temp | awk -F "=" '{print$2}' | grep -q $LUCKNUM` && break 16 done 17 } 18 19 recycle(){ 20 rm -rf var_conf.temp 21 unset ARRAY 22 } 23 24 25 Usage(){ 26 echo "Usage: sh `basename $0`" 27 echo "This script for draw lots between 01 and 100" 28 29 } 30 31 [ "$1" == "--help" ] && Usage && exit 0 32 while true;do 33 declare -i flag=0 34 read -p "Please enter your name or q exit:" NAME 35 [ "$NAME" == "q" ] && recycle && exit 0 36 [ -z `echo $NAME` ] && continue 37 if [ ${#ARRAY[*]} -eq 0 ];then 38 random_num 39 echo -e "Congratulations $R$NAME$N,Your lucky numbers is $R$LUCKNUM$N." 40 ARRAY[$count]=$NAME 41 echo "$NAME=$LUCKNUM" >> var_conf.temp 42 let count++ 43 else 44 for((i=0;i<${#ARRAY[*]};i++));do 45 [ "${ARRAY[$i]}" == "$NAME" ] && flag=1 && break 46 done 47 if [ $flag -eq 1 ];then 48 ESIXT_NUM=`cat var_conf.temp | grep -w "$NAME" | awk -F "=" '{print$2}'` 49 echo -e "You have drawn lots,and your number is $R$ESIXT_NUM$N,Please Next one." 50 else 51 random_num 52 echo -e "Congratulations $R$NAME$N,Your lucky numbers is $R$LUCKNUM$N." 53 ARRAY[$count]=$NAME 54 echo "$NAME=$LUCKNUM" >> var_conf.temp 55 let count++ 56 fi 57 fi 58 59 done
2017/8/19 在服务器上，写一个监控脚本。
1. 每隔10s去检测一次服务器上的httpd进程数，如果大于等于500的时候，就需要自动重启一下apache服务，并检测启动是否成功？
2. 若没有正常启动还需再一次启动，最大不成功数超过5次则需要理解发邮件通知管理员，并且以后不需要再检测！
3. 如果启动成功后，1分钟后再次检测httpd进程数，若正常则重复之前操作（每隔10s检测一次），若还是大于等于500，那放弃重启并需要发邮件给管理员，然后自动退出该脚本。假设其中发邮件脚本为之前咱们使用的mail.py
1 #!/bin/bash 2 # 3 APACHEPATH=/usr/sbin/apachectl 4 IP=`ifconfig eth0 | grep "inet addr" | awk -F: '{print$2}' | cut -d" " -f1` 5 declare -i i 6 7 checkagain() 8 { 9 sleep 60 10 PROCS=`ps -ef | grep -i "httpd" -c` 11 [ $PROCS -gt 500 ] && echo "Apache httpd restart finished,but the pros gt 500.Please Check." | mail -s "Apache httpd Monitoring ($IP)" zcm_mail@126.com && exit 0 12 main 13 } 14 15 restarthttpd() 16 { 17 for ((i=1;i<=5;i++)) do 18 $APACHEPATH restart &> /dev/null 19 [ $? -eq 0 ] && echo "Apache httpd restart finished." | mail -s "Apache httpd Monitoring ($IP)" zcm_mail@126.com && checkagain 20 done 21 echo "Apache httpd restart failed." | mail -s "Apache httpd Monitoring ($IP)" zcm_mail@126.com && exit 110 22 } 23 24 main(){ 25 while :; do 26 PROCS=`ps -ef | grep -i "httpd" -c` 27 [ $PROCS -gt 500 -o $PROCS -eq 0 ] && restarthttpd 28 sleep 10 29 done 30 } 31 32 main
2017/8/18 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；
提示，在函数中返回错误值给调用脚本，使用return
1 #!/bin/bash 2 # 3 # Author : JACK ZHAO 4 # Date : 2017/8/18 5 # Descriptions: Scripts for downloading 6 7 Usage(){ 8 echo "Usage:`basename $0` [URL] [Directory]" 9 echo "Examples:" 10 echo " `basename $0` http://mirrors.hust.edu.cn/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1611.iso /tmp" 11 } 12 13 [ $# -ne 2 ] && Usage && exit 1 14 15 download() 16 { 17 if [ -d $2 ];then 18 ! wget &>/dev/null && yum -y install wget &>/dev/null 19 if `wget -T 5 --spider $1 &>/dev/null`;then 20 echo "Start the download..." 21 wget -T 5 -P "$2" "$1" -o wget.log 22 ORIGINAL_SIZE=`grep "^Length" wget.log | awk '{print$2}'` 23 DOWNLOAD_FILE=`grep "^Saving" wget.log | awk -F: '{print$2}'| sed 's@^..@@g'|sed 's@.$@@g' ` 24 DOWNLOAD_SIZE=`cat $DOWNLOAD_FILE | wc -c` 25 if [ -e $DOWNLOAD_FILE ] && [ $ORIGINAL_SIZE -eq $DOWNLOAD_SIZE ];then 26 echo "Download successful" 27 return 0 28 else 29 echo "Download failed, please check" 30 return 52 31 fi 32 else 33 echo "$1 is a Invalid link,Please check again." 34 return 53 35 fi 36 else 37 read -p "[$2 It doesn't exist, it's going to be created? y/n]:" CHOICE 38 if [ $CHOICE == "n" ];then 39 echo "You've pulled out of the script" 40 return 51 41 else 42 mkdir -p $2 && download $1 $2 43 fi 44 fi 45 } 46 47 download $1 $2
2017/8/17 脚本的功能：脚本可以带参数也可以不带，参数可以有多个，每个参数必须是一个目录，脚本检查参数个数，若等于0，则列出当前目录本身；否则，显示每个参数包含的子目录。
1 #!/bin/bash 2 # 3 4 if [ $# -eq 0 ];then 5 echo "##### Current directory listing ##### " 6 ls -ld `pwd` 7 else 8 for i in "$@";do 9 if [ -d "$i" ];then 10 echo -e "#####\033[32m$i's subdirectories\033[0m#####" 11 ls -R "$i" | grep '^/' | sed 's/:$//g' 12 else 13 echo -e "#####\033[32m$i's subdirectories\033[0m#####" 14 echo -e "\033[31mDirectory does not exist.\033[0m" 15 fi 16 done 17 fi
2017/8/16 提示用户输入网卡的名字，然后我们用脚本输出网卡的ip。 看似简单，但是需要考虑多个方面，比如我们输入的不符合网卡名字的规范，怎么应对。名字符合规范，但是根本就没有这个网卡有怎么应对。
1 #!/bin/bash 2 # 3 4 read -p "Get Ip for rhel6,Please Enter:[ethX | quit]:" MYETH 5 NETWORK_HOME="/etc/sysconfig/network-scripts/" 6 ETH_COUNT=`ls ${NETWORK_HOME}ifcfg-eth* | grep -c "$MYETH"` 7 8 if [ $ETH_COUNT -eq 0 ];then 9 echo "$MYETH No exists." 10 else 11 echo -e "$MYETH:\n`ip add show $MYETH | grep "\<inet\>" | awk -F "[/|/t]" '{print$2}'`" 12 fi 13 14 [root@localhost ~]# ./816.sh 15 Get Ip for rhel6,Please Enter:[ethX | quit]:eth0 16 eth0: 17 192.168.0.107 18 192.168.0.112 19 192.168.0.113
2017/8/15 写一个脚本，执行后，打印一行提示“Please input a number:"，要求用户输入数值，然后打印出该数值，然后再次要求用户输入数值。直到用户输入"end"停止。
1 #!/bin/bash 2 # 3 4 while true;do 5 read -p "Please input a number or end:" NUMBER 6 [ -z `echo $NUMBER` ] && echo "Please put in something,Try again." && continue 7 [ $NUMBER == "end" ] && echo "You've quit." && break 8 if `echo $NUMBER | grep -q '[^0-9]'`;then 9 echo "$NUMBER is not integer number.Please Try again." 10 else 11 echo "You put in number is :$NUMBER" 12 fi 13 done
2017/8/14 假设，当前MySQL服务的root密码为123456，写脚本检测MySQL服务是否正常（比如，可以正常进入mysql执行show processlist），并检测一下当前的MySQL服务是主还是从，如果是从，请判断它的主从服务是否异常。如果是主，则不需要做什么。
View Code2017/8/13 写一个脚本,检测你的网络流量，并记录到一个日志里，需要按照如下格式，并且一分钟统计一次（只需要统计外网网卡，假设网卡名字为eth0)：
2017-08-04 01:11
eth0 input: 1000bps
eth0 output : 200000bps
###################
2017-08-04 01:12
eth0 input: 1000bps
eth0 output : 200000bps
1 #!/bin/bash 2 # 3 while true;do 4 sar -n DEV 1 60 > sar.demp 5 6 RX=`egrep 'Average:.*eth0' sar.demp | awk '{print$5}'` 7 SX=`egrep 'Average:.*eth0' sar.demp | awk '{print$6}'` 8 9 RX_B=${RX%.*} 10 SX_B=${SX%.*} 11 12 echo "##############" | tee -a /tmp/network.log 13 echo "`date +%F" "%H:%m`" | tee -a /tmp/network.log 14 15 RX_BPS=`echo "$RX_B*8" | bc` 16 SX_BPS=`echo "$SX_B*8" | bc` 17 18 echo "Eth0 input:$RX_BPS/bps" 19 echo "Eth0 ouput:$SX_BPS/bps" 20 done
2017/8/12 使用传参的方法写个脚本，实现加减乘除的功能。例如： sh a.sh 1 2，这样会分别计算加、减、乘、除的结果。
要求：
1 脚本需判断提供的两个数字必须为整数。
2 当做减法或者除法时，需要判断哪个数字大。
3 减法时需要用大的数字减小的数字。
4 除法时需要用大的数字除以小的数字，并且结果需要保留两个小数点。
1 #!/bin/bash 2 # 3 4 if [ $# -ne 2 ];then 5 echo "Usage:`basename $0` parameter1 parameter2" 6 echo "The operations of addition, subtraction, multiplication, and division of two positive integers." 7 exit 1 8 fi 9 10 if [ ! -z `echo $1 | sed 's@[[:digit:]]@@g'` ] || [ ! -z `echo $2 | sed 's@[[:digit:]]@@g'` ];then 11 echo "Argument must be positive integer." 12 exit 2 13 fi 14 15 SUM=$[$1+$2] 16 printf "%-10s %-10s\n" SUM: "$1 + $2 = $SUM" 17 18 if [ $1 -ge $2 ];then 19 SUBTRACT=$[$1-$2] 20 printf "%-10s %-10s\n" Subtract: "$1 - $2 = $SUBTRACT" 21 else 22 SUBTRACT=$[$2-$1] 23 printf "%-10s %-10s\n" Subtract: "$2 - $1 = $SUBTRACT" 24 fi 25 26 MULTIPLY=$[$1*$2] 27 printf "%-10s %-10s\n" Multiply: "$1 * $2 = $MULTIPLY" 28 29 30 if [ $1 -ge $2 ];then 31 DIVIDE=`echo "scale=2;$1/$2" | bc` 32 printf "%-10s %-10s\n" Subtract: "$1 / $2 = $DIVIDE" 33 else 34 DIVIDE=`echo "scale=2;$2/$1" | bc` 35 printf "%-10s %-10s\n" Subtract: "$2 / $1 = $DIVIDE" 36 fi
2017/8/11 要求如下：
1.只支持三个选项 ‘--del’ ‘--add’ --help输入其他选项报错。
2.使用‘--add’需要验证用户名是否存在，存在则反馈存在。且不添加。 不存在则创建该用户，切添加与该用户名相同的密码。并且反馈。
3.使用‘--del’ 需要验证用户名是否存在，存在则删除用户及其家目录。不存在则反馈该用户不存在。
4.--help 选项反馈出使用方法
5.支持以，分隔 一次删除多个或者添加多个用户。
6.能用echo $? 检测脚本执行情况 成功删除或者添加为0,报错信息为其他数字。
7.能以，分割。一次性添加或者 删除多个用户。 例如 adddel.sh --add user1,user2,user3.......
8.不允许存在明显bug。
1 #!/bin/bash 2 # 3 4 Usage() 5 { 6 cat << EOF 7 Usage:useradmin [--add|--del|--help] 8 eg: 9 useradmin --add user1,user2,... 10 useradmin --del user1,user2,... 11 useradmin --help 12 EOF 13 } 14 15 myuseradd(){ 16 USERS=`echo $1 | awk -F "," '{for(i=1;i<=NF;i++)printf("%s\n",$i)}'` 17 for i in $USERS;do 18 if `id $i &>/dev/null`;then 19 echo "User:$i Already exists." 20 else 21 useradd $i && echo "$i"| passwd --stdin $i &>/dev/null 22 if [ $? -eq 0 ];then 23 echo "User:$i Add success." 24 else 25 echo "User:$i Add failed." 26 return 1; 27 fi 28 fi 29 done 30 return 0; 31 } 32 33 myuserdel(){ 34 USERS=`echo $1 | awk -F "," '{for(i=1;i<=NF;i++)printf("%s\n",$i);print""}'` 35 for i in $USERS;do 36 if ` ! id $i &>/dev/null`;then 37 echo "User:$i No exists." 38 else 39 userdel -r $i 40 if [ $? -eq 0 ];then 41 echo "User:$i Delete success." 42 else 43 echo "User:$i Delete failed." 44 return 1; 45 fi 46 fi 47 done 48 return 0; 49 } 50 51 [ ! -z `echo -e $2|sed 's@[[:alnum:],]@@g'` ] && echo "ERROR:User names must be numbers and letters or combinations of them" && Usage && exit 1; 52 case $1 in 53 --add) 54 myuseradd $2 55 ;; 56 --del) 57 myuserdel $2 58 ;; 59 --help) 60 Usage 61 exit 0; 62 ;; 63 *) 64 Usage 65 exit 1; 66 ;; 67 esac
2017/8/10 要求如下：
假设，当前MySQL服务的root密码为123456，写脚本检测MySQL服务是否正常（比如，可以正常进入mysql执行show processlist），并检测一下当前的MySQL服务是主还是从，
如果是从，请判断它的主从服务是否异常。如果是主，则不需要做什么。
1 #!/bin/bash 2 # 3 4 MYSQL_URL="mysql -uroot -p123456" 5 MYSQL_PRO=`ps -ef | grep mysqld | grep -v "grep" -c` 6 if [ $MYSQL_PRO -gt 0 ];then 7 $MYSQL_URL -e "show slave status \G" > /tmp/slave.temp 8 if [ `wc -l /tmp/slave.temp | awk '{print$1}'` -eq 0 ];then 9 echo "MySQL is master,It is starting..." 10 else 11 SLAVE1=`grep "Slave_IO_Running" /tmp/slave.temp | awk -F ":" '{print$2}'` 12 SLAVE2=`grep '\<Slave_SQL_Running\>' /tmp/slave.temp | awk -F ":" '{print$2}'` 13 if [ $SLAVE1 == "Yes" -a $SLAVE2 == "Yes" ];then 14 echo "Mysql is slave,Running normal." 15 else 16 echo "Mysql is slave,Running NO normal." 17 fi 18 fi 19 else 20 echo "MySQL service exception." 21 fi 22 rm -rf /tmp/slave.temp
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