监控服务器swap并重启php的Shell脚本

折中一下，写个脚本监控swap吧，放在crontab里面，2小时执行一次，世界安静了，再也没有烦人的报警短信了

#!/bin/bash
function usage
{
        echo "usage: $0"
        echo "e.g. $0 1500"
        exit
}
if [ $# -lt 1 ];then
        usage
fi
typeset -i nowswap limitswap
limitswap=$1
nowswap=$(free -m|grep "swap"|sed -e "s/\(.*\)\:\(.*\)/\2/g"|awk '{print $2}')
if [ $limitswap -lt $nowswap ];then
        while [ 1 ]
        do
                if /etc/init.d/php5-fpm restart|grep -c fail
                then echo "[$(date +%y/%m/%d0-%h:%m)]restart php failed"
                else
                        echo "[$(date +%y/%m/%d-%h:%m)]restart php successful!"
                        break
                fi
        done
fi

注：if /etc/init.d/php5-fpm restart|grep -c fail 这一句中间的命令换成你自己的即可