Objective 106.1: Install and Configure X11
X.Org is the most popular X Window implementation on Linux, replacing XFree86.
Window managers handle the functions of creating and managing windows and things such as minimization, maximization, and screen placement.
Desktop environments are collections of common desktop programs that work together to create a unified desktop experience. These will include applications such as window managers, file managers, launch bars, screensavers, and session managers. The two most common desktop environments are Gnome and KDE.
The main configuration file for X.Org is /etc/X11/xorg.conf.
X Window can be configured to either read fonts from a local directory or access a font server, such as xfs, running either on the local machine or on another machine on the network.