cleanfilesolderthan7days

#!/bin/bash

#setup a threshold which we are begining to clean the old files if the usage exceeds this threahold
THRESHILD=80

# find out the current uage in the file system, especiallyfor /de/sda1
# /dev/sda1       197G  143G   45G  77% /
# then we have 77 in CURRENT
CURRENT=$(df -P | grep /dev/sda1 | awk '{ print $5}' | sed 's/%//g')

# LOGFOLDER is the folder containing daily logs
LOGFOLDER=/mnt/extend-disk/

if [ $CURRENT -lt $THRESHOLD ]; then
        echo "normal exist"
        exit 0
fi

#begin clean files which are older than 7 days
echo "begin clean files which are older than 7 days"

# find out the log path, in this example, we have _tmp as the suffix of our log folder.
LOGPATH=$(ls $LOGFOLDER | grep _tmp)
# use -mtime +7 to indicate we are finding files which are 7 day old.
find $LOGFOLDER$LOGPATH -mtime +7 -exec rm {} \;