Display Manager
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Display Manager
A display manager, or login manager, is a graphical interface screen that is displayed at the end of the boot process in place of the default shell. There are various types of display managers, just as there are various types of window and desktop managers. There is usually a certain amount of customization and themeability available with these managers.
Installation
Choose and install a preferred display manager:
XDM: X Display Manager
SLiM: Simple Login Manager (and used for XFCE)
Checking
Check into /etc/sysconfig/desktop file if you have only uncommented line is the one related to the display manager you want.