Possible Duplicate:
Is it possible to change my terminal window prompt text?
I have been using "Ubuntu 12.04" for few days now (no previous Linux experiences at all) and I have noticed that the symbols on each command line more then this in many examples in the network.
For example, I have:

And I want to remove the "gotqn-System-Product-Name" part, because it is taking too much space?
What should I do to change this?