内存检测

#!/bin/bash
#Inspect Memory : If the memory is less than 500 , then send mail to wl
#Tue Aug 2 09:13:43 CST 2016

PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/wl/bin
export PATH

MEM=$(free -m | grep "Mem" | awk '{print $4}')

if [[ MEM < 500 ]];then
    echo -e "Memory Warning : Memory free $MEM" > /service/script/.MemoryWarning
    mail -s "Memory Warning" wl < /service/script/.MemoryWarning
fi