Shell Programming--while Loops

Script

[[email protected] shell]# vim while2.sh#!/bin/bashi=6while [ $i -gt 0 ]do    i=$[$i-1]    echo $idone

Execution results

[[email protected] shell]# sh while2.sh543210

Script

[[email protected] shell]# vim while1.sh#!/bin/bashload=`w|head -1|awk -F ‘load average: ‘ ‘{print $2}‘|cut -d. -f1`while [ $load -lt 10 ]do    echo $load    /usr/lib/zabbix/alertscripts/mail.py 15******[email protected] "load high" "$load"    exitdone

Execution results Here is the script to send the mail, of course, my mailbox will also receive an alarm message

[[email protected] shell]# sh while1.sh0

Shell Programming--while Loops