#!/bin/bash
#static size for directory
size1=$(/usr/bin/du -sk /home/backup |/bin/cut -f1)
if [ 10240 -lt $size1 ] #当前目录大于指定大小后，执行以下操作；
 then
 chmod -R 400 /home/backup
fi
#static size for directory
size2=$(/usr/bin/du -sk /home/backup1 |/bin/cut -f1)
if [ 10240 -lt $size2 ]
 then
        chmod -R 400 /home/backup1;
fi
exit