What is the best to clean/remove unused packages/files/logs for fedora as it seems to me that a lot of files are sitting there that are useless. I tried dnf clean or … but I have the impression that nothing is happening so where I should search and clean manually? Thanks again
https://dnf.readthedocs.io/en/latest/command_ref.html#clean-command-label
dnf clean is not what you need. Maybe you are looking for something like sudo dnf autoremove, but be careful with what it wants to remove.
duplicate packages: dnf list installed --showduplicates, sudo dnf remove --duplicates, be careful.
clean/rotate log files: systemd/Journal - ArchWiki, Cleaning up systemd journal logs on Fedora,
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