The X server is a single binary executable (/usr/bin/Xorg). Associated configuration files are stored in the /etc/X11/ directory (as is a symbolic link — X — which points to /usr/bin/Xorg). The configuration file for the X server is /etc/X11/xorg.conf.

The directory /usr/lib/xorg/modules/ contains X server modules that can be loaded dynamically at runtime. By default, only some modules in /usr/lib/xorg/modules/ are automatically loaded by the X server.

To load optional modules, they must be specified in the X server configuration file, /etc/X11/xorg.conf. For more information about loading modules, refer to Section 30.3.1.5, “Module”.

When Red Hat Enterprise Linux 5.0.0 is installed, the configuration files for X are created using information gathered about the system hardware during the installation process.