原文地址：linux下使用无线网卡的命令行方法(wifi,iwconfig) 作者：andyhzw

(1)首先关闭开发板的有线网卡

[root@FriendlyARM /]# ifconfig eth0 down

(2)加载USB WiFi无线网卡

[root@FriendlyARM /]# ifconfig wlan0 up

(3)扫描可用的无线网络

[root@FriendlyARM /]# iwlist scanning | grep ESSID

lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wmaster0  Interface doesn't support scanning.

                    ESSID:"FRIENDLY-ARM"

                    ESSID:"NETGEAR"

                    ESSID:"TP-LINK"

(4)选择要连接的无线网络

[root@FriendlyARM /]# iwconfig wlan0 essid "FRIENDLY-ARM"

(5)输入该网络的安全密码

[root@FriendlyARM /]# iwconfig wlan0 key s:12345

(6)连接到指定的AP(无线路由)

[root@FriendlyARM /]# iwconfig wlan0 ap auto

(7)设置无线网卡的IP地址

[root@FriendlyARM /]# ifconfig wlan0 192.168.1.120

(8)使用 ping 命令检测无线网连通状况

[root@FriendlyARM /]# ping 192.168.1.1

PING 192.168.1.1 (192.168.1.1): 56 data bytes

64 bytes from 192.168.1.1: seq=0 ttl=64 time=42.804 ms

64 bytes from 192.168.1.1: seq=1 ttl=64 time=5.020 ms

转载自：http://blog.csdn.net/goodlixueyong/article/details/6461871