On Wed, Jan 06, 2021 at 04:32:02PM +0100, Yvan Masson wrote: > Let's say I have a directory `/dir`. Is it possible to allow a user to do > whatever he wants inside this directory, but not to delete `/dir`?
Yes. Simply change the owner of /dir to theuser, but make sure the parent of /dir (which is / or root because of course you did not give a POOR EXAMPLE which has a different number of slashes than the actual directory!!) is owned by root, and isn't writable by "group" or "other". Since / should already be owned by root, there's nothing required there, but you can verify its ownership and permissions with ls -ld /
