Did you run load.sh first, to make sure you're on the right driver? Also, airmon-ng doesn't properly work with the version of aircrack-ng in the repos, because it conflicts with installing iw, and iw is apparently necessary for airmon-ng working right. In otherwords, I don't know all the technical details. Do this to put your card into monitor mode if airmon-ng doesn't work: Code: ifconfig wlan0 down iwconfig wlan0 mode monitor ifconfig wlan0 up Notice that the first and third command are iFconfig, the second one is iWconfig. If you use ifconfig instead of iwconfig it'll just give you an error. I never used iwconfig instead of ifconfig, so I'm not sure what it does. Also, I'm pretty sure you need to be root to do it.
ifconfig wlan0 down iwconfig wlan0 mode monitor ifconfig wlan0 up