# free -m |awk ‘NR==3 {print $NF}‘

4012

#!/bin/bash                                   脚本

used_mem=`free -m |awk ‘NR==3 {print$NF}‘`

if [ $used_mem -lt 5000]

then

  echo"mem is not enough,$used_mem."

  echo"mem is not enough,$used_mem."|mail -s "mem warning $(data +%F)"qq@qq.com     #发邮件

fi

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内存监控及报警shell脚本