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CentOS7命令行链接wifi教程

1、首先，切换到超级管理用户

[user@localhost]$ su root

2、检查当前可用的网卡，红色标记的就是网卡，这个并不是都是相同的

[root@localhost]$ iw dev

phy#0

Interface wlp2s0

ifindex 3

wdev 0x1

addr a4:db:30:84:4b:1c

type managed

以上是未连接网络的打印信息，如果已经连上则如下：

[root@localhost]# iw dev

phy#0

Interface wlp2s0

ifindex 3

wdev 0x1

addr a4:db:30:84:4b:1c

ssid liylr

type managed

channel 11 (2462 MHz), width: 40 MHz, center1: 2452 MHz

ssid就是广播信道名称，也就是你的无线网络信号，广播信道就是最后一个

3、查看连接前的初始状态

[root@ localhost]# ifconfig wlp2s0

wlp2s0: flags=4098 < BROADCAST,MULTICAST> mtu 1500

ether 60:d8:19:cc:74:84 txqueuelen 1000 (Ethernet)

RX packets 13547 bytes 13381624 (12.7 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 12659 bytes 1974514 (1.8 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

4、测试是否已经链接网络

[root@ localhost]# iw wlp2s0 link

Not connected.

5、获取SSID

[root@ localhost]# iw wlp2s0 scan | grep SSID

command failed: Network is down (-100)

无线网络未激活，先激活。

[root@ localhost]# ifconfig wlp2s0 up

[root@ localhost]# ifconfig wlp2s0

wlp2s0: flags=4099 < UP,BROADCAST,MULTICAST> mtu 1500

ether 60:d8:19:cc:74:84 txqueuelen 1000 (Ethernet)

RX packets 13547 bytes 13381624 (12.7 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 12659 bytes 1974514 (1.8 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

6、查看所有可用的无线网络信号

[root@localhost]# iw wlp2s0 scan | grep SSID

SSID: USER-20150101NS_Network_2

SSID: Tenda_17BEF8

SSID: PC-20140723DBVC_Network_1

SSID: 123

SSID: Tenda_0A6410

SSID: xiaohui

SSID: Tenda_51E4F0

SSID: Nobody Can

SSID: TP-LINK_3C479

7、连接无线网

[root@localhost]# wpa_supplicant -B -i wlp2s0 -c <(wpa_passphrase "Tenda_17BEF8" "useradmin")

Successfully initialized wpa_supplicant

Tenda_17BEF8是你想链接的SSID，useradmin为链接密码。

8、分配IP地址(通过dhclient控制网卡进行网络操作获取IP)

[root@localhost]# dhclient wlp2s0

9、最后，查看无线网卡地址信息，有ip地址表示网络连接成功了

[root@ localhost]# ifconfig wlp2s0

wlp2s0: flags=4163< UP,BROADCAST,RUNNING,MULTICAST> mtu 1500

inet 192.168.168.139 netmask 255.255.255.0 broadcast 192.168.168.255

inet6 fe80::62d8:19ff:fecc:7484 prefixlen 64 scopeid 0x20

ether 60:d8:19:cc:74:84 txqueuelen 1000 (Ethernet)

RX packets 13567 bytes 13386147 (12.7 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 12682 bytes 1979923 (1.8 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

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