X

X

Short for X Window; software that controls the display and input devices, thereby providing a software foundation on top of which desktop managers like KDE are able to run.

X11

Version 11 of the X software, currently in use on most desktop Linux systems.

XFree86 Project

Organization that creates X software and, in particular, a set of programs called XFree86. At one time, every distribution of Linux used XFree86 software, but most now use similar software from the Xorg organization.

xinetd

The service responsible for starting various network servers on the computer.

XMMS

Audio player program.

xterm

Simple program that allows you to run a shell under X. This program has the advantage of being available on most Linux systems that offer a GUI.