shell备份目录脚本

#!/bin/bash
dir="/samba/operations"
backup="/data"
filename="operations.tar.bzip2"
date=`date +%Y%m%d`
[ ! -e "$dir" ] && echo "请联系管理员" && exit
[ ! -e "$backup" ] && mkdir $backup
/bin/mkdir $backup/$date
/bin/tar jcvf  $backup/$date/$filename  $dir/
find "$backup" -type d -mtime +20 -exec rm {} \;