#!/bin/bash
#####定义变量#############
mt=`free -m | grep M |awk '{print $2}'`
mf=`free -m | grep -|awk '{print $4}'`
sf=`free -m | grep S|awk '{print $4}'`
st=`free -m | grep S|awk '{print $2}'`
warn=$(($mf*100/$mt))
sw=$(($sf*100/$st))
if [$warn -lt 20];then
echo "the empty space in memory is lower than $warn"
exit1
if [$sw -lt 20];then
echo " your mermory is not enough,please check on"
exit 2
fi
else
echo " the memory is running normal"
exit 0
fi
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