Centos8安装完成后连接WI-FI

JiuyeXD

June 9, 2021

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2267 words

技术杂谈

## 1. 问题描述

ummmmm 把系统玩炸了 重装之后发现之前遇到的不能使用wifi问题还发生 就记录一下

之前各种搜索各种论坛博客去逛发现都需要网络下载其他支持包 而我当时就偏不信

我就觉得带界面的centos8默认可以连wifi凭什么无gui的就不可以 我觉得肯定内置了相关的命令

后来我发现是我太年轻了 当时折腾了两天都不行 还是得需要有线网络的支持 然后放弃了...

## 2. 解决方法

#### 2.1 排查问题

输入 `ifconfig -a` 如下

```
[root@021129 ~]# ifconfig -a
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.31.161  netmask 255.255.255.0  broadcast 192.168.31.255
        inet6 fe80::fe34:97ff:fe64:f8d5  prefixlen 64  scopeid 0x20<link>
        ether fc:34:97:64:f8:d5  txqueuelen 1000  (Ethernet)
        RX packets 741  bytes 82992 (81.0 KiB)
        RX errors 0  dropped 8  overruns 0  frame 0
        TX packets 925  bytes 218437 (213.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0x92300000-92320000

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp4s0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 70:9c:d1:ef:6b:2c  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

```

显示 `wlp4s0` 未启用

执行 `nmcli d` 后发现 wlp4s0 unmanged

```
[root@021129 ~]# nmcli d
DEVICE  TYPE      STATE      CONNECTION 
eno1    ethernet  connected  eno1   
lo      loopback  unmanaged  --   
wlp4s0  wifi      unmanaged  --

```

执行 `ifup wlp4s0` 后发现未输出任何信息

```
[root@021129 ~]# ifup wlp4s0
Error: unknown connection '/etc/sysconfig/network-scripts/ifcfg-wlp4s0'.
```

#### 2.2 下载依赖

执行 `yum install NetworkManager-wifi`

```
Installed:

NetworkManager-wifi-1:1.30.0-7.el8.x86_64  
  crda-3.18_2020.04.29-1.el8.noarch  
  iw-4.14-5.el8.x86_64  
  wpa_supplicant-1:2.9-5.el8.x86_64

Complete!
```

#### 2.3 重启

```
[root@021129 ~]# reboot
```

![image.png](https://old.qwq.ro/usr/uploads/2021/06/1115266277.png)

此时在输入 `nmcli d` 发现wifi已连接