GNU/Linux Debian Bullseye Non-free Repository Add Step-by-step Guide

October 18, 2019 | By the+gnu+linux+evangelist | Filed in: Tutorial.

Adding Repo

  1. 2. Adding Non-free Repo

    Then to Add Non Free Repository in Debian Bullseye
    Simply run:

    sudo apt-add-repository non-free

    And then Refresh the Apt Sources with:

    sudo apt update
  2. 3. Preserving Debian Free System

    (Optional) This if you want to Preserve the Valuable Free Nature of Debian System.
    To do so you have to strictly Allowing only the Installation of Some Non-free Package with an Apt Pinning.
    First Disable All Non free Software with this content:

    Explanation: Disable packages from non-free tree by default
    Package: *
    Pin: release o=Debian,a=stable,l=Debian,c=non-free
    Pin-Priority: -1
    

    To Make it at once execute:

    sudo echo -e "Explanation: Disable packages from non-free tree by default\nPackage: *\nPin: release o=Debian,a=stable,l=Debian,c=non-free\nPin-Priority: -1" > /etc/apt/preferences.d/non-free_policy

    And then Enable the Software of Choice, E.g. firmware-iwlwifi:

    Explanation: Enable package firmware-iwlwifi from non-free tree
    Package: firmware-iwlwifi
    Pin: release o=Debian,a=stable,l=Debian,c=non-free
    Pin-Priority: 110
    

    Again with a simple echo:)

    sudo echo -e "Explanation: Enable package firmware-iwlwifi from non-free tree\nPackage: firmware-iwlwifi\nPin: release o=Debian,a=stable,l=Debian,c=non-free\nPin-Priority: 110" > /etc/apt/preferences.d/firmware-iwlwifi_non-free

    But to enable Multiple packages at once proceed like that:

    Explanation: Enable package firmware-iwlwifi nvidia-driver from non-free tree
    Package: firmware-iwlwifi nvidia-driver
    Pin: release o=Debian,a=stable,l=Debian,c=non-free
    Pin-Priority: 110
    

    Again translated in a Command like:

    sudo echo -e "Explanation: Enable package firmware-iwlwifi nvidia-driver from non-free tree\nPackage: firmware-iwlwifi nvidia-driver\nPin: release o=Debian,a=stable,l=Debian,c=non-free\nPin-Priority: 110" > /etc/apt/preferences.d/enabled-packages_non-free

    The only drawback of the procedure is that you have to repeat it every time you need some new Non-free software…
    For further instructions see: Advanced Apt Pinning Techniques.

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