X Window System
The classic Linux graphics system, in which an X server draws windows for client programs that may run on the same or another machine.
In more detail
The DISPLAY variable, such as :0 or office-pc:0.1, tells a client which server and screen to use. Most distributions now default to Wayland, which runs older X programs through Xwayland.
Related terms
- display manager — The graphical login screen, such as GDM or SDDM, that starts the chosen desktop session once a user signs in.
Taught in
- X11: The Server Is Your Screen — LPIC-1 Linux Administrator (101-500 and 102-500) Exam Prep