CLI user administration?

[Jordan Miller]

hello,

I have searched Google and all Ubuntu sites I can find. I am sure  
there is a simple answer, but I do not know the name of the command.  
How can I administer user accounts using only the command line?

I have a headless Ubuntu install (5.10) serving as a webserver, but i  
need to add a few admin user accounts. I found the new unofficial  
ubuntu guide at: http://easylinux.info/wiki/ 
Ubuntu#Users_Administration , but alas, the instructions require a GUI.

thanks,
Jordan