root@buzz:/etc/rc.d# dhclient wlan0
Internet Systems Consortium DHCP Client V3.0.5
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/wlan0/00:13:d4:f4:ad:b6
Sending on   LPF/wlan0/00:13:d4:f4:ad:b6
Sending on   Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

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LUEGO PARA COMPROBAR LA INFORMACION QUE LE METI A wlan0

root@buzz:/etc/rc.d# iwconfig wlan0
wlan0     IEEE 802.11b  ESSID:"Osorno"  Nickname:"buzz"
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:1C:10:41:65:6D   
          Bit Rate=6 Mb/s   Sensitivity=-200 dBm  
          RTS thr=2346 B   Fragment thr=2346 B   
          Encryption key:1234-5678-90   Security mode:restricted
          Power Management:off
          Link Quality:34/100  Signal level:-74 dBm  Noise level:-96 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0
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Y EL ESCANEO AL NODO QUE ME QUIERO CONECTAR
wlan0     Scan completed :
          Cell 01 - Address: 00:1B:11:D1:70:E3
                    ESSID:"latorre"
                    Protocol:IEEE 802.11b
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:0/100  Signal level:-96 dBm  Noise level:-96 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0
          Cell 02 - Address: 00:1C:10:41:65:6D
                    ESSID:"Osorno"
                    Protocol:IEEE 802.11b
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:37/100  Signal level:-72 dBm  Noise level:-96 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
                              12 Mb/s; 48 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0