shell脚本编程进阶while循环和控制

1.配置发邮件的设置

set from=29308620@qq.com
set smtp=smtp.qq.com
set smtp-auth-user=29308620@qq.com
set smtp-auth-password=esvnhbnqocirbicf
set smtp-auth=login
set ssl-verify=ignore

将上述追加到/etc/mail.rc中

 

2.配置发邮件的邮箱

#!/bin/bash
WARNING=80
while true;do
     USE=`df | sed -rn '/^\/dev\/sd/s#.* ([0-9]+)%.*#\1#p' |sort -nr|head -n1`
     if [ $USE -gt $WARNING ];then
             echo Disk will be full from `hostname -I` | mail -s "disk warning" 791402385@qq.com
     fi
     sleep 10
done   

 

 

 

3.continue

提前结束当前循环

1：提前结束当前1次循环

2：提前结束当前2次循环

范例：100内奇数相加

 

 

4.break

退出当前循环

1：退出当前第一轮循环

2：退出当前第二轮循环