The console is the workstation at which you are physically seated. At TUNL, the Unix workstations are either made by Sun, or are PC's running the Linux operating system. On the Sun workstations, you will see a login screen that asks for your username. After you enter that you will be asked for your password. (Note that the password is not echoed to the screen. This is so someone cannot steal your password by looking over your shoulder.) On the Linux PC's the login screen will have boxes for both on the same screen. After you enter this information, an X-windows session will begin (more on this in Section I.2).