matteo@ubuntu:~$ iwconfig
wlan0     IEEE 802.11bg  ESSID:"WLAN_C6BD"
          Mode:Managed  Frequency:2.422 GHz  Access Point: 64:68:0C:42:C6:C0
          Bit Rate=1 Mb/s   Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=9/70  Signal level=-101 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:37906  Invalid misc:123956   Missed beacon:0

lo        no wireless extensions.

eth0      no wireless extensions.

wlan1     IEEE 802.11bgn  ESSID:off/any
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on