#!/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