A-and-connect to-network through WIFI on Centos 7

I bought a DELL laptop,but can not connect to network through WiFi. There ' s lots of methods on the internet,but few of them resolve my problem. If u face the same situation,u can try my.

Phenomenon:

1 ' No-carrier

2 ' Unmanaged

KEY Steps:

1.Get WiFi interface ' s Name

[[email protected] ~]$ NMCLI device
DEVICE TYPE State CONNECTION
Virbr0 Bridge connected Virbr0
virbr0-nic Tap Connected Virbr0-nic
P1P1 Ethernet Unavailable--
lo Loopback unmanaged--
wlp6s0 wifi unmanaged --

2.Enble WiFi Module

[[Email protected] ~]$ IP link show wlp6s0
3:WLP6S0: <BROADCAST,MULTICAST> MTU qdisc NoOp State down mode DEFAULT Qlen 1000
Link/ether B0:C0:90:32:C4:FA BRD FF:FF:FF:FF:FF:FF

[email protected] ~]$ su
Password:
[[Email protected] does]# IP link set wlp6s0 up
[[Email protected] does]# IP link show wlp6s0
3:WLP6S0: <no-carrier, Broadcast,multicast,up > MTU Qdisc MQ-state-down mode DEFAULT Qlen 1000
Link/ether B0:C0:90:32:C4:FA BRD FF:FF:FF:FF:FF:FF

3.Scan the Wireless Net

[Email protected] does]# IW WLP6S0 Scan | grep SSID
Ssid:ahello
Ssid:huohb
Ssid:null
ssid:c2303102
Ssid:xiaofeibao

Note:null is the name of my SSID.

[email protected]:~# wpa_passphrase NULL >>/etc/wpa_supplicant.conf123456[email protected]:~# (where ' 123456 ' is the Network password)
Note:there is a-to-input the SSID and password in the command line,but it doesn ' t work on my PC.
4.Connect to Network
[email protected] does]# wpa_supplicant-b-i wlp6s0-c/etc/wpa_supplicant.conf
successfully initialized Wpa_supplicant
[[Email protected] does]# IP add show wlp6s0
3:wlp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc MQ State up Qlen
link/ether B0:C0:90:32:C4:FA BRD ff:ff:ff:ff:ff:ff
inet6 fe80::b2c0:90ff:fe32:c4fa/64 Scope link
Valid_lft Forever Preferred_lft Forever
5.Get IP Address
[email protected] does]# dhclient wlp6s0
[[Email protected] does]# IP add show wlp6s0
3:wlp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc MQ State up Qlen
link/ether B0:C0:90:32:C4:FA BRD ff:ff:ff:ff:ff:ff
inet 192.168.1.105/24 BRD 192.168.1.255 scope Global Dynamic WLP6S0
valid_lft 7202sec preferred_lft 7202sec
inet6 fe80::b2c0:90ff:fe32:c4fa/64 Scope link
Valid_lft Forever Preferred_lft Forever
6.Test
[[email protected] does]# Ping www.baidu.com
PING www.a.shifen.com (111.13.100.91) bytes of data.
Bytes from 111.13.100.91:icmp_seq=1 ttl=54 time=7.02 ms
Bytes from 111.13.100.91:icmp_seq=2 ttl=54 time=6.10 ms
Bytes from 111.13.100.91:icmp_seq=3 ttl=54 time=24.7 ms
Bytes from 111.13.100.91:icmp_seq=4 ttl=54 time=5.93 ms
^c
---www.a.shifen.com ping statistics---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
RTT Min/avg/max/mdev = 5.938/10.964/24.794/7.995 ms

Results:

[[Email protected] does]# IP link show wlp6s0
3:WLP6S0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc MQ State up mode dormant Qlen 1000
Link/ether B0:C0:90:32:C4:FA BRD FF:FF:FF:FF:FF:FF

[[email protected] does]# NMCLI device
DEVICE TYPE State CONNECTION
Virbr0 Bridge connected Virbr0
virbr0-nic Tap Connected Virbr0-nic
wlp6s0 wifi connected wlp6s0
P1P1 Ethernet Unavailable--
Lo Loopback unmanaged

Reference:

http://www.blackmoreops.com/2014/09/18/connect-to-wifi-network-from-command-line-in-linux/

KeyWords

Connect to Wi-Fi network from command line in Linux

A-and-connect to-network through WIFI on Centos 7