And what about the scanning and add wifi in ubuntu 8.10?

To add wifi at ubuntu 8.10 we can add additional software wpa_supplicant. Through this software we can scan and add wifi wifi wpa-based. To install wpa_supplicant please run the following command:

udiniq@server:~# apt-get install wpasupplicant
udiniq@server:~# vim /etc/default/wpasupplicant

--by pressing the letter i add the following line--

ENABLED=0

--save by pressing :wq and Enter--

After wpa_supplicant installed, the next step is to add wifi in wpa_supplicant, steps :

udiniq@server:~# iwlist wlan0 scanning

Through this command the wireless laptops will wiriles scanning their surroundings, the following is an example of the scan results :

wlan0 Scan completed :
Cell 01 - Address: 00:16:B6:E1:89:E8
ESSID:"ECHO+"
Mode:Master
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=85/100 Signal level:-48 dBm Noise level=-83 dBm
Encryption key:on
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP

Can be seen from the results of scanning, wireless lapetop I can catch 2 wireless, ie ECHO + and SOBAT01.

From the results of scanning over wireless I assume that we will use the wireless essid is ECHO +, add step in our lapetop is as follows:

udiniq@server:~# vim /etc/wpa_supplicant.conf

--by pressing the letter i add the following line--

ctrl_interface=/var/run/wpa_supplicant
network={
ssid="ECHO+"
psk="passowrd wireless"
key_mgmt=WPA-PSK
proto=WPA
}

--save by pressing :wq and Enter--

Then run the following command :

udiniq@server:~# wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf -dd

The next step is setting ip address on our wifi:

1. Wireless IP Address using DHCP

udiniq@server:~# dhclient wlan0