You can get a terminal by moving your
mouse-pointer to an empty spot on you desktop, clicking the right
mouse-button on choosing ``Open Terminal'' from the pull-down menu.
You can run commands in the terminal by typing them next
to the command line prompt (usually something like $) followed by
hitting the return-button.
$ date
Fri Aug 30 13:33:50 CEST 2013
To get more information about a command type man followed
by the command-name and hitting the return-button.
Leave the man pages by pressing the q-key.