Whenever I try to listen to a specific wifi channel using airodump I got : fixed channel wlan0: -1
I try to change the channel but it's always -1!
I use Ubuntu 12.04.
What you have to do is execute ifconfig wlan0 down
make sure you are not connected to any wireless network, try:
airodump-ng -<the channel you want> --bssid<the wireless network you want> mon0
If it doesn't work, try:
ifconfig wlan0 down then ifconfig mon0 down then iwconfig mon0 mode monitor then ifconfig wlan0 up then ifconfig mon0 up and try to sniff now.