Setting up Differential Backups for Websites

Backups. No one likes doing them, but they’re too important not to do. Typically when I’m doing stuff for my websites, I will occasionally do a tar of a directory and save it off, or even set up a script that will do this nightly. Then I have issues with disks filling up, and not wanting to delete my backups for fear of losing something (like the 20 copies aren’t enough!)
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