linux下使用无线网卡的命令行方法(wifi,iwconfig)
(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