What do you actually back up from a home server?
I keep going back and forth. Right now: the docker volumes, /etc, and a list of installed packages. Not the OS. Not the media, that's replaceable.
Curious what other people include and how often they test a restore.
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Volumes, /etc, compose files, and the crontabs. I forgot crontabs once. Restore test twice a year, in a VM.
Add the list of docker images with their tags. Latest moves.
/etc, /home, a package list. In a tarball, on another machine, with a date in the name. It's not complicated. People just want it to be.