> > Trivial example: you have a directory with a bunch of subdirectories.
> > You want owners of subdirectories to see them. You don't want them
> > to _know_ about other subdirectories.
>
> Security through obscurity, that is.
Huh? By the same logics /etc/shadow is security through obscurity -
after all, you can try all possible passwords one by one. Ability to use
key != ability to see valid keys.
> Do you have even a single dir on your boxes with r!=x?
Yes.
Please, go to rtfm.mit.edu and find the UNIX FAQ there. Then read the
relevant parts.
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