temporary su login

[gs_stoller at juno.com]

Tamouh wrote:
>> Robin Becker wrote:
>> > My collocation supplier is about to move our FreeBSD box and wants 
>> > some way to shut it down cleanly. Is there a simple way to allow a 
>> > non-root user to have shutdown rights without just giving them the 
>> > world. At present I don't even allow login via ssh on that 
>> box ie it's 
>> > purely key based.
>> 	What I would do is develop a script (owned by  root ) 
>> and callable by everybody which then checks the  user-id  of 
>> its caller, and if it is an acceptable one, the script will 
>> issue a warning (to wall) and then shutdown the system.
>> 
>
> why not ask them to do CTRL+ALT+DEL which will reboot the server cleanly and once it hit 
> does the intial reset, turn it off.

	Yes, CTRL+ALT+DEL will reboot the server cleanly,
but it does not shutdown the previous session nicely, it shuts it
down catastrophically, and it can be done by anyone with access
to the system keyboard.  Robin asked for a way to allow one specific
 non-root user  to be able to shutdown the system.