Remove KDE or GNOME From Linux

X Windows desktops like KDE or GNOME are not required on a server, and waste valuable resources. These should therefore be removed:
yum groupremove “X Window System”

This will remove around 100-150 packages from the server.

Doing this will prevent an intruder from starting an X-Windows session on the server by typing startx at the shell prompt.

Installation of X-Windows can also be completely prevented during initial system installation.