The latest of several files at preserving the directory, delete other

#!/bin/bash

# Retain the number of files
ReservedNum=5
FileDir=/data/bak
date=$(date "+%Y%m%d-%H%M%S")

FileNum = $ ( ls -l $ FileDir | grip ^ - | wc - l)

while(( $FileNum > $ReservedNum))
do
OldFile=$(ls -rt $FileDir| head -1)
echo $date "Delete File:"$OldFile
rm -rf $FileDir/$OldFile
let "FileNum--"
done 

 

Original link: https: //blog.csdn.net/liyyzz33/article/details/84571044