linux之shell语言_shell ls *-优快云博客

if [ -d /tmp/dbback ] #判断dbback这个文件是否存在
   then
       echo "Date is: $date" > /tmp/dbback/db.txt #输出时间，以21230这种格式
   echo "Size is: $size" >> /tmp/dbback/db.txt #统计大小
       cd /tmp/dbback
       tar -zcf chen_$date.tar.gz /root/chen /tmp/dbback/db.txt &>/dev/null #在tmp/dbback下面进行打包
       rm -rf /tmp/dbback/db.txt
   else
       mkdir /tmp/dbback
       echo "Date is:$date" > /tmp/dbback/db.txt
       echo "Size is:$size" >>/tmp/dbback/db.txt
       cd /tmp/dbback
       tar -zcf chen_$date.tar.gz /root/chen /tmp/dbback/db.txt $>/dev/null
       rm -rf /tmp/dbback/db.txt
fi

--------------------------

if3.sh：判断httpd是否启动，如果没有启动会自动启动流程

vim if3.sh

#!/bin/bash
#判断apache是否启动:service httpd restart,停止service httpd stop
#如果停止不了，ps命令，然后kill杀掉进程。
rate=$(nmap 192.168.61.128 | grep "tcp" | grep "http" | awk '{ print $2 }' ) #nmap命令与awk命令结合使用,筛选出“open”
if [ "$rate" == "open" ] #如果$tate等于open
   then
       echo "$(date) httpd is ok !!!" >> /tmp/httpd_acc.log
   else
       /etc/rc.d/init.d/httpd restart &>/dev/null #启动httpd
       echo "$(date) httpd reboot!!" >> /tmp/httpd_err.log
fi

---------------------------------

if4.sh：判断输入的是什么文件类型

vim if4.sh
#!/bin/bash
#判断用户输入的是什么文件
read -p "please input a filename:" file
if [ -z "$file" ] #判断file变量是否为空
   then
       echo "Error please "
       exit 1
elif [ ! -e "$file" ] #判断file这个值是否存在
   then
       echo "you input is not a file" #如果file这个值不存在
       exit 2
elif [ -f "$file" ] #判断file变量是否为普通文件
       then
       echo " $file is a regulare file !"
elif [ -d "$file" ] #判断file变量是否为目录文件
       then
       echo "$file is a direcotry!"
else
       echo "$file is an other file!"

--------------------------

if5.sh：选择一个你想去的城市（用caase语句）

vim if5.sh
#!/bin/bash
echo "如果你想去上海，请选择1"
echo "如果你想去广州，请选择2"
echo "如果你想去成都，请选择3"
read -t 30 -p "请选择你想去的城市:" cho
case "$cho" in
   "1")
       echo "上海欢迎你！"
       ;;
   "2")
       echo "广州欢迎你！！"
       ;;
   "3")
       echo "成都欢迎你！"
       ;;
   *)
       echo "请按提示输入1/2/3 ！！！！！！"
       ;;

esac

---------------------------------------

for1.sh：依次输出数字1-6

vim for1.sh

#!/bin/bash
#一次输出数字1-6
for i in 1 2 3 4 5 6
   do
       echo "$i"
   done

--------------

for2.sh：批量解压脚本

vim for2.sh
#!/bin/bash
#批量解压脚本

cd /root/sh/if
ls *.sh >ls.log
for i in $(cat ls.log)
   do
       tar -zcf $i &>/dev/null
       rm -rf /root/sh/if/ls.log
   done

---------------------

for2.1.sh：统计if目录下以.sh结尾文件的个数

vim for2.1.sh

#!/bin/bash
#统计if文件下以.sh的个数
cd /root/sh/if
ls *.sh >ls1.log
y=1
for i in $(cat ls1.log)
   do
       echo "$y"
       y=$(($y + 1))
   done

-----------------

for3.sh：求1到100的总和

vim for3.sh

#!/bin/bash
#求1加到100的总和
s=0
for ((i=1;i<=100;i++))
   do
       s=$(($s + $i))
   done
echo "1+2+3+...100总和为:$s"

----------------------------

useradd.sh:批量添加用户

vim useradd.sh
#!/bin/bash
#批量添加用户
read -t 30 -p "请输入添加的同户名:" name
read -t 30 -p "请输入添加的个数:" number
read -t 30 -p "请输入初始密码:" pass
if [ ! -z "$name" -a ! -z "$number" -a ! -z "$pass" ]
   then
       y=$(echo $number | sed 's/^[0-9]*$'//g)
       if [ -z "$y" ]
           then
               for((i=1;i<=$number;i++))
                   do
                       useradd $name$i &>/dev/null
                       echo $pass | passwd --stdin "$name$i" &>/dev/null
                   done
       fi
fi