parece que encontro una red pero ahora puedo ponerla en modo monitor?
sudo iwconfig wlan0 power off
sudo iwlist wlan0 scan
ubuntu@ubuntu:~$ sudo iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: 00:02:2D:60:6D:96
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=40/70 Signal level=-70 dBm
Encryption key:on
ESSID:"CBMAYOL-2007"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Mode:Master
Extra:tsf=000000151f490c6c
Extra: Last beacon: 508ms ago
IE: Unknown: 000C43424D41594F4C2D32303037
IE: Unknown: 010482848B96
IE: Unknown: 03010A
ubuntu@ubuntu:~$