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Chapter 14. Enabling and enforcing GNOME Shell extensions

GNOME Shell extensions are add-ons that enhance the functionality and appearance of the GNOME desktop environment. Users can enable extensions for their own desktop session or for all users on the system.

14.1. Enabling system-wide GNOME Shell extensions
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You can automatically enable GNOME extensions for all users, which eliminates the need for individual installations. Existing users with personalized extensions are not affected.

Prerequisites

  • Administrative access.

Procedure

  1. Download the extension archive from the GNOME Extensions website.

  2. Extract the archive into the /usr/share/gnome-shell/extensions/ directory: 

    # unzip -q <extension-file.zip> -d /usr/share/gnome-shell/extensions/
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    Replace <extension-file.zip> with the name of the extension zip file.

  3. Adjust the permissions to ensure that the extension files are readable and executable by everyone: 

    # chmod -R 755 /usr/share/gnome-shell/extensions/<extension-directory>/
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    Replace <extension-directory> with the name of the extension directory.

  4. Create a new /etc/dconf/db/local.d/00-extensions file with the following content: 

    [org/gnome/shell]
enabled-extensions=['myextension1@myname.example.com', 'myextension2@myname.example.com']
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    Replace the UUIDs (myextension1@myname.example.com, myextension2@myname.example.com) with the ones you want to enable. You can find the UUID of an extension on its GNOME Shell extensions website page.

  5. Apply the changes to the system databases: 

    # dconf update
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After completing these steps, the specified extensions are enabled by default for all new users on your system.

14.2. Restricting GNOME Shell extensions
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By locking down specific GNOME Shell extensions, you can ensure that a predefined set of extensions is consistently available to all users. You can configure a set of mandatory extensions and prevent users from modifying them. The specified extensions are mandatory for all users, and the Looking Glass tool is disabled to ensure compliance with the predefined configuration.

Prerequisites

  • Administrative access.

Procedure

  1. Create a new /etc/dconf/db/local.d/00-extensions file with the following content: 

    [org/gnome/shell]
enabled-extensions=['myextension1@myname.example.com', 'myextension2@myname.example.com']
development-tools=false
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    Replace the UUIDs (myextension1@myname.example.com, myextension2@myname.example.com) with the ones you want to enable. You can find the UUID of an extension on its GNOME Shell extensions website page.

  2. To prevent users from changing these settings, create a new /etc/dconf/db/local.d/locks/extensions file with the following content: 

    /org/gnome/shell/enabled-extensions
/org/gnome/shell/development-tools
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  3. Apply the changes to the system databases: 

    # dconf update
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Extensions that are not listed in the org.gnome.shell.enabled-extensions file are not loaded by the GNOME Shell, preventing the user from using them.

14.3. Managing GNOME Shell extensions by using the command line
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The gnome-extensions utility is a command-line tool to manage GNOME Shell extensions from the terminal. It provides various commands to list, install, enable, disable, remove, and get information about extensions.

Each GNOME Shell extension has a Universally Unique Identifier (UUID). You can find the UUID of an extension on its GNOME Shell extensions website page.

Procedure

  • To list the installed GNOME Shell extensions, use: 

    $ gnome-extensions list
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  • To install a GNOME Shell extension, use: 

    $ gnome-extensions install <UUID>
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  • To enable a GNOME Shell extension, use: 

    $ gnome-extensions enable <UUID>
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  • To show information about a GNOME Shell extension, use: 

    $ gnome-extensions info <UUID>
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  • To disable a GNOME Shell extension, use: 

    $ gnome-extensions disable <UUID>
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  • To remove a GNOME Shell extension, use: 

    $ gnome-extensions uninstall <UUID>
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Replace the <UUIDs> with the unique identifier assigned to the GNOME Shell extension you want to install.

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