To logout of a text environment, you must be at a command prompt. Type the command exit and press the Enter key, or press ^D (Ctrl-D).
To logout of a graphical environment you will need to find a logout or exit option on one of the menus. This will usually be found under a button on the lower left part of the screen (in Microsoft ``Start'' button fashion), or by clicking one of the mouse buttons while the pointer is on the desktop (a place where no windows are opened). Some graphical environments will also prompt you to logout when you press Ctrl-Alt-Del. A last-resort method of terminating a graphical environment is to press Ctrl-Alt-Backspace, which is sometimes referred to as ``zapping'' the server. It will generally close everything down, but programs may not get a chance to shut down nicely.