lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     802.11bg  ESSID:"casinha"  Nickname:"rtl8191SEVA2"
          Mode:Managed  Frequency=2.442 GHz  Access Point: 00:13:46:11:08:68   
          Bit Rate=54 Mb/s   
          Retry:on   RTS thr:off   Fragment thr:off
          Power Management period:0us  mode:All packets received
          Link Quality=97/100  Signal level=-53 dBm  Noise level=-118 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0