Kali Linux Fern Wifi Cracker No Wireless Interface Was Found -

sudo airmon-ng start wlan0 # Replace wlan0 with your interface name This creates a monitor interface like wlan0mon .

iwconfig Or:

sudo systemctl restart NetworkManager Sometimes Fern fails to switch the card to monitor mode automatically. Do it manually:

If you see nothing, your adapter is either not connected or not recognized. NetworkManager and other services can block the interface.