As a Newbie I need some info

[Cliff Garner]

Hi,

As a Newbie I seem unable to send or receive most Ubantu info (other 
than the free Ubantu downloads) because I keep being asked for my user 
name, which I do not know.  I have a display name, but that is not 
accepted as a user name.  Please help me set up a user name. You can 
reach me at kosmik999 at comcast.net. I am in Las Cruces, New Mexico, 
USA.   Call me Cliff G.   Thank you.