I'm trying to do a simple system backup (with cpio or tar), and I was looking for what I need to back up and found this question. The answer was basically, "it depends on what you're running on your machine".
If there is a disk failure, I want to easily get my server running again without having to reinstall a lot of things. I'm using a web server and a fair amount of 3rd party programs. I'm thinking I'll back up everything except the absolutely unnecessary.
So are there any directories that I shouldn't backup because it would be a waste of time and disk space?