A More Complex Case: rm-rf-with-file.t (continued 6)

• In case where I have only read permissions on the third-level subdirectory, I can see that there is something called a inside that directory.

        $ ls -l foo_10237_0400/
        ls: cannot access 'foo_10237_0400/a': Permission denied
        total 0
        -????????? ? ? ? ?            ? a

• That's a the benefit of the read permission

• But I can't see any of that file's metadata and I am denied permission to that file itself

• The cost of not having execute permissions on the directory.