Command to launch the default desktop environment, whatever it is set to.
startx
Keystrokes to return a user to the graphical interface from a virtual console when using LightDM.
Alt + F7
In Fedora: Set GDM as the default display manager.
vi /etc/X11/default-display-manager
/usr/sbin/gdm
In Debian: Set the default display manager to LightDM.
dpkg-reconfigure lightdm
Modifies /etc/lightdm
Path to the conf file that contains greeting information for LightDM.
/etc/lightdm/lightdm-gtk-greeter.conf