CentOS7 command line tutorial for connecting to wireless network

I made my computer a dual system before and added a centos7 server. Now I can't connect to the Internet at home when I go home for the holidays, and I'm all worried. .

After some investigation, I finally connected, leaving a note for future reference, haha.

1. First, switch to the super administrative user

[user@localhost]$ su root

2. Check the currently available network cards. The network cards marked in red are not all the same.

[root@localhost]$ iw dev

phy#0

Interface wlp2s0

ifindex 3

wdev 0x1

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

type managed

[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 is the name of the broadcast channel, which is your wireless network signal, and the broadcast channel is the last

3. View the initial state before connection

[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. Test whether the network is connected

[root@ localhost]# iw wlp2s0 link

Not connected.

5. Get SSID

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

command failed: Network is down (-100)

The wireless network is not activated, please activate it first.

[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. View all available wireless network signals

[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. Connect to wireless network

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

Successfully initialized wpa_supplicant

Tenda_17BEF8 is the SSID you want to connect to, and useradmin is the link password.

8. Assign IP address (obtain IP through network card control through dhclient)

[root@localhost]# dhclient wlp2s0

9. Finally, check the wireless network card address information. If there is an IP address, it means the network connection is successful

[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

The above is the detailed content of CentOS7 command line tutorial for connecting to wireless network. For more information, please follow other related articles on the PHP Chinese website!