Going green with shutdown command

[stream303]

My G5 iMac lacks any sort of hibernate or standby, but I still wanted to save energy. I'm usually pretty good about shutting down manually, but sometimes forget about it when the screensaver is black and I can't hear the machine running.

I was checking out Dirk's nice blog and it hit me - why not keep it simple?

http://linuxtidbits.wordpress.com/

In the past I just memorized the shutdown command but never really bothered to read the man page.

Simple solution: just use the shutdown command with a delayed response.

Shutdown 4 hours from now:

sudo shutdown -h +240

Shutdown at 11:30 pm:

sudo shutdown -h 23:30

I just run this in a terminal and then minimize it. For convenience, I just rename the terminal to "shutdown" and when I call it up, I can see how close I am to shutdown, or just cancel it completely with a CTRL-C.

Until they release full specs on the G5, this is the best I can do so far.

** UPDATE*** For an even better way to shutdown based on user-inactivity, see:
http://ubuntuforums.org/showthread.php?t=530973

[stream303]

oops. Tried to shutdown via the gui with a shutdown already running in a terminal, and it logs you out and brings you back to the gdm login.

Guess you have to kill the delayed-shutdown in the terminal first.