How to keep the shell script of the specified number of files remaining under the file system in linux

This article mainly introduces how to retain the specified number of files in linux under the file system of the shell script, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian with you to understand.

Example:

The code is as follows:

#! / bin/bash

#--

# Description: Back up your files

# site: www.yisu.com

#--

# shell variable

Path_source=/mnt/fifth/shell

Path_backup=/mnt/fifth/backup/shellbackup

Path_delete=/mnt/fifth/tmp/rubbish/

Limit_num=15

FileBackup ()

{

Set-x

# backup files

# cp-r $1 $2 Universe shell`date +% Ymuri% MMI% dMMI% HMI% MMI% 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 -"

# move files

Ls $1-1rt | head-n $num | xargs-N1-I mv $1 / {} $2

Set + x

Ls-1rt $2

Echo "- Moving endurance -"

Else

Ls-1rt $2

Echo "- The file is too littlebones -"

Fi

}

# backup shell script

FileBackup $path_backup $path_delete $limit_num

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