Let's say I create a new ext4 filesystem for exclusive use by alice and when I mount it, say, on /mnt/alice I set the permissions so that alice can work in that directory: # mkfs.ext4 /dev/foo # mount /dev/foo /mnt/alice # chown alice:alice /mnt/alice # chmod 775 /mnt/alice But now /mnt/alice/lost+found is at the mercy of alice since she has write permission for /mnt/alice. [How] can I protect /mnt/alice/lost+found from removal by alice? Thoughts? b.
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