How to Disable Built in Wifi on Ubuntu Gnu/Linux

Disabling

2. 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.

3. 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.

   

4. 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.