Ensure the X Window system is not installed 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 Window system is typically used on desktops where users login, but not on servers where users typically do not login. [yes/no] Unless your organization specifically requires graphical login access via X Windows, remove it to reduce the potential attack surface. Fix: Uninstall X Windows: # apt-get purge xserver-xorg-core* oval:org.secpod.oval:def:55151 SCAP Repo OVAL Definition 2019-06-19