1. Optical media is for some reason mounted in /run/media/root.

  2. Disable the login screen user list. Works with all DE's.
    2.1. Create a gdm database for machine-wide settings in /etc/dconf/db/gdm .d/00-loginscreen:
    2.2. [org/gnome/login-screen]
    # Do not show the user list
    disable-user-list=true
    2.3. Run # dconf update.

  3. Gnome Shell Extensions should be installed in /usr/share/gnom e-shell/extensions.
    3.1. Enabline machine-wide extensions in /etc/dconf/db/local.d/00-extensions.
    3.2. Run dconf update after every tweak.

  4. Gnome Shell Extension plugin for Firefox: https://www.centos.org/forums/viewtopic.php?f=47&t=47513.

  5. Enabling the Ctrl-Alt-Backspace Shortcut:
    5.1. Create a local database for machine-wide settings in /etc/dconf/db/local.d/00-inputsources.
    5.2. [org/gnome/desktop/input-sources]
    # Enable Ctrl-Alt-Backspace for all users
    xkb-options=['term inate:ctrl_alt_bksp']
    5.3. 
    Override the user's setting and prevent the user from changing it in
    /etc/dconf/db/local.d/locks/input-sources.
    5.4. # Lock the list of enabled XKB options
    /org/gnom e/desktop/input-sources/xkb-options
    5.5. 
    dconf update

  6. ...

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