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How to Install Realtek Rtl8821CE Driver Offline on Debian Bullseye – Step-by-step

December 13, 2021 | By the+gnu+linux+evangelist.

Installing Requirements

  1. 1. Launching Terminal App

    Open a Terminal Shell Emulator Window:
    (Press “Enter” to Execute Commands)

    Open Terminal

    In case first see: Terminal QuickStart Guide.

  2. 1. Launching Terminal App

    Open a Terminal Shell Emulator Window:
    (Press “Enter” to Execute Commands)

    Open Terminal

    In case first see: Terminal QuickStart Guide.

  3. 2. Finding Linux Headers

    Now to find the needed Linux Headers Release
    Check your current Kernel Version with:

    uname -r

    And take Note of it.

  4. 3. Downloading Linux Headers

    Download Linux Headers for Debian Bullseye GNU/Linux

    Linux Headers for Debian

    Ctrl/Cmd+f to Search for “linux-headers” on Browser.
    But if you Do Not find the Matching Versions then see instead: Installing Debian Bullseye Kernel without Internet.

  5. 4. Installing linux-headers Offline

    Then to Set up linux-headers Offline on Debian
    First, access the Target USB Driver or Location:

    cd /[path/2/linux-headers]

    But if you are in Trouble to Find it out on Terminal then See: How to Access USB Device.
    To Check the Package is there:

    ls | grep headers

    The grep Command Refine the output List showing only the entries Matching the Keyword.
    Then simply play:

    sudo apt install ./linux-headers*.deb

    Or:

    sudo dpkg -i ./linux-headers*.deb

    Authenticate with the User Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo.

  6. 5. Downloading Dependencies

    Download Required Packages for Debian GNU/Linux

    Packages tar.gz Archive
  7. 6. Installing Dependencies

    Then to Install Required Stuff
    First, access the Target:

    cd /[path/2/usb]

    Then to Extract the Stuff:

    tar xvzf ./dkms*.tar.gz

    And then to Install all the included Packages play:

    sudo dpkg -Ri ./dkms*

    Again in case of issue try:

    sudo apt -f install

    Authenticate with the User Admin Pass.
    If Got “User is Not in Sudoers file” then see: How to Enable sudo.
    And then Reboot your System with:

    sudo reboot

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