很多时候备份通常会使用到基于日期来创建文件夹，对于这些日期文件夹下面又有很多子文件夹，对于这些日期文件整个移除，通过find结合rm或者delete显得有些力不从心。本文提供一个简单的小脚本，可以嵌入到其他脚本，也可直接调用，如下文供大家参考。
1、脚本内容
[root@SZDB ~]# more purge_datedir.sh
#!/bin/bash
# Author: Leshami
# Blog :
RemoveDir=/log/hotbak/physical
dt=`date +%Y%m%d -d "3 day ago"`
for subdir in `ls $RemoveDir`;
do
if [ "${subdir}" \< "${dt}" ];
then
rm -rf $RemoveDir/$subdir >/dev/null
echo "The directory $RemoveDir/$subdir has been removed."
fi
done
2、演示
[root@SZDB ~]# ls /log/hotbak/physical
20141203 20141210 20141217 20141224 20141231 20150107 20150114 20150125 tmp.sh
20141207 20141214 20141221 20141228 20150104 20150111 20150121 20150128
[root@SZDB ~]# ./purge_datedir.sh
The directory /log/hotbak/physical/20141203 has been removed.
The directory /log/hotbak/physical/20141207 has been removed.
The directory /log/hotbak/physical/20141210 has been removed.
The directory /log/hotbak/physical/20141214 has been removed.
The directory /log/hotbak/physical/20141217 has been removed.
The directory /log/hotbak/physical/20141221 has been removed.
The directory /log/hotbak/physical/20141224 has been removed.
The directory /log/hotbak/physical/20141228 has been removed.
The directory /log/hotbak/physical/20141231 has been removed.
The directory /log/hotbak/physical/20150104 has been removed.
The directory /log/hotbak/physical/20150107 has been removed.
The directory /log/hotbak/physical/20150111 has been removed.
The directory /log/hotbak/physical/20150114 has been removed.
The directory /log/hotbak/physical/20150121 has been removed.
[root@SZDB ~]# ls /log/hotbak/physical
20150125 20150128
cat命令利用Linux重定向合并文件
Linux Shell参数替换