[newbie] How to put linux into sleep mode after 4 hours of idel time

Hello: I want my linux machine to go into sleep mode (similar to Stand by in W2K) after 2 hours of idle time. Is this something I can do and how?   Thanks Ravi

[newbie] How to put linux into sleep mode after 4 hours of idel time

Hello: I want my linux machine to go into sleep mode (similar to Stand by in W2K) after 2 hours of idle time. Is this something I can do and how?   Thanks Ravi