turning off computer

[I Brake for Moths <rikki@zool46.bio.utk.edu>]

Is there a way for a user without root priveleges to cleanly unmount the 
root file system and shutdown the computer?

I've been running 'init 0' as root before turning off the box, but I 
don't want to have to give out the root password to my family (it's bad 
enough that I know it!) just so they can turn the thing off when I'm not 
around.  We'd rather not leave it on when it is not in use.

Thanks,
Rikki

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