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In this video, you'll learn about the graphics server configuration.

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Let's talk about initialization first.

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To install Linux with a graphical display, you just select the appropriate option while

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installing.

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As an alternative, you can also install the graphical packages later, so your non-graphical

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server can easily be turned into a graphical installation.

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After installing the graphical packages, you set the default systemd target to graphical.target

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to boot into graphical mode.

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That would be systemctl set default is graphical.target.

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And then gdm.service is started to provide the standard GDM login if you are using the

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standard GNOME interface which you will find on Ubuntu as well as Red Hat Family.

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The GDM display manager can use the configuration file etc.gdm.custom.conf to specify which

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graphical server should be used.

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And further, Wayland initialization is managed through user-share-wayland-sessions-gnome-wayland.desktop

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in your GNOME graphical environment.

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The main Wayland component as discussed before is the compositor, which allows the graphical

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applications to draw to screens.

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The compositor is provided by the desktop environment, and mutter is the default compositor

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for the common GNOME graphical desktop environment.

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To start applications the right way, user-based environment variables are used.

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And these are gdk-backend for GTK applications and qt-underscore-qpa-underscore-platform

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for QuickTime applications.