"Part 1 of this article provided the general background a reader
needs to solve problems with Linux. Part 2 of this article
discussed the process of solving Linux problems. In this final part
of a three-part series, we'll step through a real-world example of
solving a Linux problem.
"X Window is the video part of the Linux operating system, with
Xserver acting as the internal server that delivers the video to
your display. The configuration file read during startup also plays
some part in driver setup for other built-in hardware like the
keyboard, mouse, and even functions like font selection..."