監控web80端口

判斷本機的80端口是否開啓着，若是開啓着什麼都不作，若是發現端口不存在，那麼重啓一下httpd服務，併發郵件通知你本身。

#! /bin/bash
mail=123@123.com
if netstat -lnp |grep ':80' |grep -q 'LISTEN'; then
exit
else
/usr/local/apache2/bin/apachectl restart >/dev/null 2> /dev/null
python mail.py $mail "check_80" "The 80 port is down."
n=`ps aux |grep httpd|grep -cv grep`
if [ $n -eq 0 ]; then
/usr/local/apache2/bin/apachectl start 2>/tmp/apache_start.err
fi
if [ -s /tmp/apache_start.err ]; then
python mail.py $mail 'apache_start_error' `cat /tmp/apache_start.err`
fi
fi