[PLUG] Shutdown on Lan...

[म.हा.सा.ग.र]

Just wanted to know if there is facility or feature to shutdown all Linux PCs 
on lan after an authorized network device sends a signal or issues a command 
in some way...over the network...

{This could be really helpful to some people working in Linux environment and 
participating under power handicapped category [Limited UPS backup] after 
games start in Pune's Electrical Supply Olympic :-}

Looking for inspiring answers after mandatory google failed to locate अर्थ.
-- 
The 0nly thing you take with you, when you are gone 
is what you leave behind...!    -- a wise soul
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