Controlling network traffic with firewalld.Displaying a user prompt on the GNOME login screen.Understanding and administering systemd.Performing administration tasks using sudo.Configuring networking with NetworkManager CLI (nmcli).Disabling the GNOME automatic screen locking.Setting a key shortcut to run an application in GNOME.Configuring Xorg as the default GNOME session.Configuring X Window System using the nf file.Installing Chromium or Google Chrome browsers.Installing plugins for playing movies and music.APT command equivalents on Fedora with DNF.Securing the system by keeping it up-to-date.Adding or removing software repositories in Fedora.Finding and installing Linux applications.Creating and using a live installation image.