[Shell script] Services watchdog

這隻script的功能就是當偵測到所指定的port於本機沒有啟動的話，就會將它自動重啟，放在cron table裡定時檢查吧！

#!/bin/bash

SRVLIST='80:/etc/init.d/httpd

25:/etc/init.d/postfix

22:/etc/init.d/sshd

110:/etc/init.d/dovecot'

for SRV in `echo $SRVLIST`

do

 nc -w 1 localhost `echo $SRV | cut -d: -f1` > /dev/null 2>&1 && echo "Port $SRV fine" || `echo $SRV|cut -d: -f2` restart

done