What directories are safe to exclude from system backups?
Specifically, is it ok to omit
/var/cache/dnf/, which is ~500MB and often changing, and/or
My daily backups end up including a lot of added or modified files in those directories, which might be unnecessary.
I already exclude the following list of directories, as well as any that contains a CACHEDIR.TAG file:
- /dev/* - /proc/* - /run/* - /sys/* - /tmp/* - /var/lock/* - /var/run/* - /var/tmp/* - /root/.cache/* - /home/*/.cache/*