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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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