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iwconfig shows you your wireless' network configuration. It is a command that is part of the Wireless Tools. To install it, install the Wireless Tools aaplication.

Example usage:

$ iwconfig
lo        no wireless extensions.

eth1      no wireless extensions. 

eth13     IEEE 802.11b/g  ESSID:"SWWLAN"  Nickname:"kolossus"
          Mode:Managed  Frequency:2.457 GHz  Access Point: 00:0F:C9:01:F5:F4
          Bit Rate:12 Mb/s   Tx-Power=31 dBm   Sensitivity=20/200
          Retry min limit:8   RTS thr=2347 B   Fragment thr=2346 B
          Encryption key:off
          Link Quality:89/0  Signal level:-82 dBm  Noise level:-194 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

sit0      no wireless extensions. 


In this example, eth13 is your wireless network device. You can also point your device to a different WLAN by pointing it to the ESSID like this:

$ iwconfig eth13 essid foo

See also