How to free Linux Swap Memory

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How to free Linux Swap Memory

這篇介紹How to free Linux Swap Memory。

指令

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Shell script:

Swap=`free -k |grep Swap|awk '{print $3}'`
Mem=`free -k |grep Mem|awk '{print $4}'`
if [ $Swap -eq 0 ]; then
   echo "linux do not use swap." >> /root/free_swap.log
elif [ $Swap -ge $Mem ]; then
   echo "linux Swap usage is more than or equal to free memory." >> /root/free_swap.log
else
   free -m
   sync;sync;sync;sync;sync
   sudo /sbin/swapoff -a
   sudo /sbin/swapon -a
   free -m
   echo "" >> /root/free_swap.log
fi