Never use 0 or 6, because those
numbers are used to shut down and reboot the system, respectively.
Because graphical login screens are designed to be configurable, you often find that the distribution
has its own logo or other graphical elements on the login screen. For example, Figure 3-1 shows a
basic graphical login panel displayed by the kdm graphical display manager.
FIGURE 3-1
A simple KDE display manager (kdm) login screen includes a clock, login name list, and a few menu selections.
With Fedora Linux, the default login screen is based on the GNOME display manager (gdm). To
begin a session, you can just enter your login (username) and password to start up your personal
desktop environment. Your selected desktop environment??”KDE or GNOME??”comes up ready for
you to use. Although the system defines a desktop environment by default, you can typically change
desktop environments on those Linux systems, such as Fedora, that offer both KDE and GNOME.
To end a session, you can choose to log out. Figure 3-2 shows the graphical menu for ending a
session or changing the computer state.
NOTE
83
Getting into the Desktop 3
FIGURE 3-2
The Session menu in Fedora
X display managers can enable you to do a lot more than just get to your desktop. Although different
graphical login screens offer different options, here are some you may encounter:
Session/Options??”Look for a Session or Options button on the login screen.
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