Logging off the system and restarting the login process is simplicity itself. To do so, click the GNOME Menu button and choose Log Out. The Are You Sure You Want to Log Out? window appears, and you’re asked to confirm that you want to log out. If you do (do you really?), click the OK button and you’re outta there. Click No if you change your mind and want to play around with your new operating system a little while longer.TipYou can also choose to reboot or halt your computer from this window by clicking either the Shutdown or Reboot button and then clicking OK to confirm your decision. Depending on which you choose, your system stops completely or reboots. You can also press the Ctrl+Alt+Backspace keys to shut down your current session. This method is less graceful but still effective, especially in case some renegade process freezes your X session.