Protect files from `rm -f` Much to my immediate chagrin, removing write permission from a file does not seem to protect it from `rm -f`: touch foo chmod a-w foo rm -f foo How can I protect a file from accidental deletion when `rm` will be called with the `-f` flag? It looks like `chattr +i foo` would work, but it requires root on my system (is that intended?), so I'm looking for a non-root solution.

To prevent files from being added or deleted to a directory, you can to remove the write permission for the directory.