Linux: Backup Verzeichnis aufräumen

#!/bin/bash
# Backups aufräumen.
# 10.07.2008, Dennis Wilmsmann

let maxcount=7
let counter=0
let folderpath=/home/dwilmsmann/backups

for backupfile in $folderpath/*; do
        let counter=$counter+1
        echo $backupfile
done
echo "Backup count:" $counter
if test $counter -gt $maxcount;
        then
                echo "Too many backups, forcing deletion…"
                let newcounter=0
                for deletefile in $folderpath/*; do
                        let newcounter=$newcounter+1
                        let temp=$counter-$maxcount
                        if test $newcounter -le $temp;
                                then
                                        rm $deletefile
                                        echo "Deleting file" $deletefile
                        fi

                done

        else
                echo "Nothing to do."
fi

drwxr-xr-x  2 smf-ftp psacln      4096 Jul 10 17:32 .
drwxr-x—  3 smf-ftp psaserv     4096 Jun 25 10:41 ..
-rw-r–r–  1 smf-ftp psacln  15384824 Jun 30 12:57 db13281_2008_06_30_12_52.sql.gz
-rw-r–r–  1 smf-ftp psacln  15396650 Jul  1 18:58 db13281_2008_07_01_18_52.sql.gz
-rw-r–r–  1 smf-ftp psacln  15434422 Jul  3 09:15 db13281_2008_07_03_09_10.sql.gz
-rw-r–r–  1 smf-ftp psacln  15422608 Jul  5 11:38 db13281_2008_07_05_11_33.sql.gz
-rw-r–r–  1 smf-ftp psacln  15430626 Jul  6 17:19 db13281_2008_07_06_17_14.sql.gz
-rw-r–r–  1 smf-ftp psacln  15437605 Jul  7 15:24 db13281_2008_07_07_15_19.sql.gz
-rw-r–r–  1 smf-ftp psacln  15438383 Jul  8 11:08 db13281_2008_07_08_11_03.sql.gz
-rw-r–r–  1 smf-ftp psacln  15455371 Jul 10 17:33 db13281_2008_07_10_17_27.sql.gz

Das Script liefert folgende Ausgabe:

Backup count: 8
Too many backups, forcing deletion…
Deleting file /home/dwilmsmann/backups/db13281_2008_06_30_12_52.sql.gz