Configure the wpa client in linux

In linux, configure the wpa client-Linux Enterprise Application-Linux server application information. For more information, see. Kernel:
Bt tools # uname-
Linux bt 2.6.20-BT-PwnSauce-NOSMP #3 Sat Feb 24 15:52:59 GMT 2007 i686 i686 i386 GNU/Linux
Bt tools #
NIC:
Bt tools # lspci-vv | grep-I 394
. 0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
Bt tools #
Operating system version:
Bt tools # cat/etc/slax-version
SLAX 6.0.0
Bt tools #
802.1x Client Version:

Bt ~ # Wpa_supplicant-v
Wpa_supplicant v0.5.7
Copyright (c) 2003-2006, Jouni Malinen And contributors
Bt ~ #
Bt tools #
Configuration File Content: wpa
Bt ~ # Cat/etc/wpa_supplicant.conf
Network = {
Ssid = "youssid"
Psk = "youpassword"
}
Bt ~ #

Command and parameters:
Command: wpa_supplicant
Parameters used:

-B = run daemon in the background
-C = Configuration file
-I = interface name
Command Execution example:
Wpa_supplicant-B-ieth0-c/etc/wpa_supplicant.conf
Obtain Address:
Dhcpcd eth0
View the NIC status and parameters:
Bt ~ # Iwconfig eth0
Eth0 IEEE 802.11g ESSID: "youssid"
Mode: Managed Frequency: 2.462 GHz Access Point: 00: 00: 00: 00: 00: 00: 00
Bit Rate: 54 Mb/s Tx-Power: 14 dBm
Retry limit: 15 RTS thr: off Fragment thr: off
Encryption key: xxxx-xxxx Security mode: open
Power Management: off
Connection Quality = 74/100 Signal level =-57 dBm Noise level =-57 dBm
Rx invalid nwid: 0 Rx invalid crypt: 1 Rx invalid frag: 0
Tx excessive retries: 0 Invalid misc: 21 Missed beacon: 0

Bt ~ # Ifconfig eth0
Eth0 Link encap: Ethernet HWaddr xx: xx
Inet addr: 192.168.2.100 Bcast: 192.168.2.255 Mask: 255.255.255.0
Inet6 addr: fe80: 218: deff: feb0: 38e5/64 Scope: Link
Up broadcast notrailers running multicast mtu: 1500 Metric: 1
RX packets: 33 errors: 2 dropped: 31 overruns: 0 frame: 0
TX packets: 12 errors: 0 dropped: 0 overruns: 0 carrier: 0
Collisions: 0 FIG: 1000
RX bytes: 11177 (10.9 KiB) TX bytes: 4324 (4.2 KiB)
Interrupt: 11 Base address: 0x2000 Memory: edf00000-edf00fff

In this way, linux can use wpa to access wireless networks, which is better than wep.