Configuring XFree86 with XF86Setup
Configuring XFree86 with XConfigurator
System and X session control with display managers
Customizing the .xinitrc startup script
Customizing your workspace
Using X11 resources
The default graphic interface for Linux is the X Window System, usually the port of X11 from the XFree86 Project, Inc. This collection of software includes nearly 3,500 files, almost 200 programs (or clients), more than 500 fonts, and more than 500 graphics in nearly 50MB of software.
There are other sources for distributions of the X Window System for Linux. A commercial distribution, which can cost from $50 to several hundred dollars, can be especially helpful if you can't get X ...