#!/bin/bash #------------------------------- #Description: Back up your files #site: www.1sucai.cn #------------------------------- #shell 变量 path_source=/mnt/fifth/shell path_backup=/mnt/fifth/backup/shellbackup path_delete=/mnt/fifth/tmp/rubbish/ limit_num=15 fileBackup() { set -x #备份文件 #cp -r $1 $2/shell-`date +%Y-%m-%d-%H-%M-%S` count=`ls $1 | wc -w` if [ "$count" -gt "$3" ];then     echo "-----------------limit is : $3 ----------------------"     echo "-----------------The number of files is : $count -------"     num=`expr $count - $3`     echo "-----------------The excess number of files is : $num ---------" #移动文件     ls $1 -1rt | head -n $num|xargs -n1 -i mv $1/{} $2     set +x     ls -1rt $2     echo "-----------------Moving end!-----------------" else     ls -1rt $2     echo "-----------------The file is too little!-------------------" fi } #备份shell脚本 fileBackup $path_backup $path_delete $limit_num