On Sat, Jul 12, 2025 at 02:51:25AM +0000, David wrote:
In fact it has been my practice for some years now to 'chown root:' and 'chmod 0' on all my mountpoints and set the immutable bit on them, to avoid accidentally writing into directories that are intended only as mountpoints. And I have never had any problem doing that, and never seen any "permission denied" messages as described in the link.
Well, for some reason you linked to AIX documentation, and while this isn't an issue on linux, it definitely has been an issue on other OSs and is a bad habit to get into if someone wants to use more than just linux. I have seen people be burned by this when using linux habits on other systems. It's a real mess because it can't be fixed on an active system. (You can't change the permissions on the underlying directory without unmounting the overlying filesystem.)