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XCCDF
Guide to the Secure Configuration of Ubuntu 16.04
Services
X Window System
X Window System
An XCCDF Group - A logical subset of the XCCDF Benchmark
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X Window System
The X Window System implementation included with the system is called X.org.
Disable X Windows
Unless there is a mission-critical reason for the system to run a graphical user interface, ensure X is not set to start automatically at boot and remove the X Windows software packages. There is usually no reason to run X Windows on a dedicated server system, as it increases the system's attack surface and consumes system resources. Administrators of server systems should instead login via SSH or on the text console.