Iwconfig

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