Shell命令_for

chmod 755 demo.sh

./demo.sh

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#!/bin/bash # Author:James 2016-10-15   # 集合以空格分割 for  i in 1 2 3 4 5 6     do         echo "$i"     done     #!/bin/bash # Author:James 2016-10-15 # 批量压缩脚本   cd /tmp/shs #所有sh文件覆盖到sh.log文件 ls *.sh > sh.log for i in $(cat sh.log)     do         #tar -zxf $i &>/dev/null         echo "File Name is $i"     done rm -rf /tmp/shs/sh.log     #!/bin/bash # Author:James 2016-10-15 # 计算1..100之和   sum=0 for(( i=1;i<=100;i++ ))         do                 #echo "$i"                 sum=$(( $sum+$i ))         done echo "sum is:$sum"       #!/bin/bash # Author:James 2016-10-15 # 批量添加用户和默认密码   #等待30秒输入name read -t 30 -p "input name:" name read -t 30 -p "input password:" pass read -t 30 -p "input number:" num   # 输入的name,pass,num都不是控制 if [ ! -z "$name" -a ! -z "$pass" -a ! -z "$num" ]         then                 # 将num变量以数字开头的结尾的字符改为空字符串                 y=$(echo $num | sed 's/^[0-9]*$'//g)                 #变量y为空，表示num变量都是数字                 if [ -z "$y" ]                         then                                 for(( i=1;i<=$num;i++ ))                                         do                                                 #批量添加用户                                                 /usr/sbin/useradd "$name$i" &>/dev/null                                                 #批量赋予默认密码                                                 echo $pass | /usr/bin/passwd --stdin "&name$i" &>/dev/null                                         done                 fi fi   # 使用cat /etc/passwd 查看用户是否增加成功

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