How to Disable Built in Wifi on Ubuntu GNU/Linux

December 18, 2020 | By the+gnu+linux+evangelist | Filed in: Tutorial.

Disabling

  1. 2. Looking up Card Name

    First, identify your Built-in Adapter Name
    So first, possibly disable the Plugged-in USB Wifi Dongle.
    Then simply play:

    ifconfig | grep wl

    The grep Command refine the output List showing only the Entries matching the Keyword.

  2. 3. Discovering Wireless Driver

    Now to find out the Wireless Kernel Module in use
    Run:

    readlink /sys/class/net/wlan0/device/driver

    Possibly replace “wlan0” with the identifier found in the former step.

    How to Disable Built in Wifi on Ubuntu GNU/Linux - Wireless Driver in use
  3. 4. Disabling Wifi Adapter

    Finally, to Turn Off Wireless Interface
    Unload the Kernel Module with:

    sudo modprobe -r [MYMOD]

    Replace with the current one in the above Command.
    So for instance:

    sudo modprobe -r wl

    Finally, to make the change permanent then Blacklist it editing:

    sudo nano /etc/modprobe.d/blacklist.conf

    And appending the blacklisted Network Interface Module like:

    blacklist wl

    Ctrl+x to Save & Exit from nano Editor.

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