Details
The X Window System provides a Graphical User Interface (GUI) where users can have multiple windows in which to run programs and various add on. The X Windows system is typically used on workstations where users login, but not on servers where users typically do not login.
Rationale:
Unless your organization specifically requires graphical login access via X Windows, remove it to reduce the potential attack surface.
Solution
Run the following command to remove the X Windows System packages:
# yum remove xorg-x11*
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Information Integrity.This control applies to the following type of system Unix.