On 12/28/22 14:45, Bill Cunningham wrote:
What files are basically safe to remove because they are caches and such? There is the invisible file .cache. And the /var/cache. The files in /tmp are these safe to delete? Are there any other files you can delete? For example if you were using rsync, what file would you not want to backup, because they are just caches?
Just because they are a cache doesn't mean they are necessarily safe to delete while running. Most applications take care of managing their cache files. Technically, you can delete stuff in /var/cache, but don't at least don't delete the top-level directories. e.g. /var/cache/dnf
Of course, if you delete cached files, that usually means that they will have to be downloaded again when you want to use them.
Don't delete files in /tmp unless you know it's safe to do so. There are important files in there and you might find things not working properly if you delete them. /tmp is by default tmpfs, so anything in there won't persist over a reboot. Also, there is a process that cleans old files, so unless you've put something big in there yourself and need the RAM back, you don't need to do anything.
For backup purposes, you can certainly skip the various cache directories. /var/cache for the system and ~/.cache for the users. I think most applications use that now, but there might be some application that stores cache files somewhere else.
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