try using the full command
Will list the options that airmon-ng requires. Normally you use it in the sense of:Code:airmon-ng --help
to initialize your card in monitor mode, (wifi can be substituted for your interface (wlan0, rasub, etc)Code:airmon-ng start wifi
more effectively is doing it manually with iwconfig, ie:
where XXXX is your interface, often wlan0 or rausb or similarCode:iwconfig XXXX mode monitor
Any command you are curious about you can typically learn more about by appending a "--help" after it.