Using a Display Manager

An X display manager presents a graphical login that requires a username and password to be entered before access is granted to the X desktop. It also enables you to choose a different desktop for your X session. Whether an X display manager is presented after you boot Linux is controlled by a runlevel—a system state entry in /etc/event.d/. The following runlevels as handled by Ubuntu are as follows:

Image 0—Halt (Do not set initdefault to this.)

Image 1—Multiuser text mode

2—X graphical multiuser mode

6—Reboot (Do not set initdefault ...

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