Which is the best and works better?
1 - iwpriv wlan0 rfmontx 1
2 - iwconfig wlan0 mode monitor
what is the diferrence?
These commands are doing two different things
[code1hpn9hlu]1 - iwpriv wlan0 rfmontx 1[/code1hpn9hlu]
Enables injection in monitor mode, this is useful if you want to send packets in the air without being associated to any AP.
This is no use outside monitor mode.
[code1hpn9hlu]2 - iwconfig wlan0 mode monitor[/code1hpn9hlu]
Switches the card to monitor mode, without touching injection settings.
Where can I find more information about the commands of the driver?
The README and iwpriv_usage.txt inside the driver package...
BTW, is packet injection supported in all rt61 cards? I have an Edimax EW-7128G but it doesn't seem to support injection with the latest CVS driver.