sudo iwconfig
[sudo] password for zeitsofa:
lo        no wireless extensions.

eth0      no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11  ESSID:"zeitsofa"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:24:FE:48:0E:DA  
          Bit Rate=54 Mb/s   Tx-Power=20 dBm  
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B  
          Encryption key:XXX [2]
          Link Quality=56/64  Signal level=62/65  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon: