Used to split my Alfa AWUS036NHA USB wireless adapter to run a managed interface and a monitor interface simultaneously.

• A compatible wireless adapter

  • see 'Troubleshooting'

• Airmon-ng

  • sudo apt install aircrack-ng

git clone https://github.com/mcgregol/split

cd split

sudo bash install

sudo bash split "current_interface" "new_interface_name" 

ex. sudo bash split wlan0 wlan1 

If you get an error and/or the program doesn't work, run sudo iw list and look under valid interface combinations. If you do not see #{ managed, P2P-client } <= 2 or #{ AP, mesh point, P2P-GO } <= 2, etc., your wireless adapter isn't compatible.