> There are probably several way to shut down your computer. The one I use is:
> shutdown -h now
> You have to be logged as root to do this.
> 
> I read this in the faqs and don't know what the -h stands for.
> Bye!

You can always read the manual pages for shutdown (i.e. man 8 shutdown ;-)

However, here's a quick summary:

shutdown now	-- bring the system back down to single-user mode (now)
shutdown -h now	-- halt the machine now (i.e. turn it off like Shutdown in 
		   the Finder)
shutdown -r now	-- reboot the machine now (like the MacOS Finder Restart)

I hope this helps some.

Later.

-- 
Colin Wood                                      ender@is.rice.edu
Consultant                                        Rice University
Information Technology Services                       Houston, TX