For other chipsets, check:
ip a Look for wlan0 , wlan1 , or similar. Kali Linux Fern Wifi Cracker No Wireless Interface Was Found
sudo systemctl restart NetworkManager Sometimes Fern fails to switch the card to monitor mode automatically. Do it manually: For other chipsets, check: ip a Look for
sudo airmon-ng check kill This kills processes like NetworkManager , wpa_supplicant , etc. For other chipsets
Now open Fern and try selecting wlan0mon . Fern must be run with root privileges: