I have weekly full manual backups being created for my site using the portal. I have it set for 4 backups. Once there are 4, the backups stop until I manually delete the oldest one. I am looking for a way to automate the process using cron to delete the oldest one. Unfortunately, it fails with the error "permission denied" since the owner is iworx. I use rsync to send them offsite for safe keeping and would like them to rotate. Thank you.