[K12OSN] removing shutdown and reboot from menus

[Doug Simpson]

I have seen this posted several times but . . .

How can I remove the "Shutdown" and "Reboot" choices from the login screen 
and also from the start menus of all clients and all desktops on an LTSP 
server?

I have had a problem with the server getting shutdown by users.

Thanks

Doug Simpson
Technology Specialist
DeQueen Public Schools
DeQueen, AR 71832
simpsond at leopards.k12.ar.us
Tux for President!