Cron job script creating corrupt archive

[roachmmflhyr]

Ive created this cron job:

# m h  dom mon dow   command
0 3 * * * /home/backup1/backupsite.sh # backup whole site

That executes this script daily:

#!/bin/bash

# backupsite.sh
tar -cjvf /mnt/disk3/site_backups/site_bkup_`date +\%F_\%H\%M`_auto.tar.bz2 /var/www/* --exclude="/var/www/backup"
cp /mnt/disk3/site_backups/site_bkup_`date +\%F_\%H\%M`_auto.tar.bz2 /var/www/backup/db_backups
chmod -R 755 /mnt/disk3/

This creates a corrupted archive everytime. When I run sudo ./backupsite.sh manually it runs just fine. What is the deal here?

[Ben Cotton]

Can you post the output from a cron run and a manual run? I'm guessing the cron job runs under the same account you use when you run it manually. There's probably a difference in the environment we'll need to hunt down.