CompTIA Linux+ (LX0-104) 6.1 Configuring Basic X Features Install Gnome 1. yum groupinstall -y "X Window System" "Desktop" "Fonts" 2. vi /etc/inittab - id:5:initdefault: 3. Reboot Install KDE 1. yum -y groupinstall "KDE desktop" "X Window System" "Fonts" Select desired window manager during login vi /etc/sysconfig/desktop DESKTOP="KDE" DISPLAYMANAGER="KDE" DESKTOP="XFCE" DISPLAYMANAGER="XDM" DESKTOP="Gnome" DISPLAYMANAGER="GDM" NOTE: Display Manager entry may not be necessary if /etc/X11/prefdm is configured properly Under the hood they all use X11 (Xorg) as their Desktop Compositor Mir and Wayland are two up and coming replacements Configuring Xorg The default config works for most users Can be customized with: Xorg -configure System - /user/share/X11/xorg.conf.d User - /home/user/xorg.conf Test using X -config /folder/xorg.conf Other utilities in X11: xwininfo - Returns geometry and other window information xdpyinfo - Returns display information GDM Use gconf-editor yum install gconf-editor vi /etc/gdm/custom.conf KDM yum install kdm /usr/share/config/kdm/kdmrc XDM yum install xdm /etc/X11/xdm/xdm-config LightDM Default desktop manager for Ubuntu Configuration Files: /usr/share/lightdm/lightdm.conf.d/*.conf /etc/lightdm/lightdm.conf.d/*.conf /etc/lightdm/lightdm.conf Generally you do not edit the config files Instead override in a separate file /etc/lightdm/lightdm.conf.d/50-custom.conf Example: Disabling Guest access and enabling username entry [SetDefaults] allow-guest=false greeter-show-manual-login=true .