CentOS7 配置USB无线网卡驱动及wifi连接

Posted 2021-04-06 shlyao的学习笔记

一、安装USB无线网卡驱动

使用命令lsusb 查看：

[root@localhost 桌面]# lsusb
Bus 001 Device 002: ID 17ef:602d Lenovo
Bus 001 Device 003: ID 17ef:602e Lenovo
Bus 003 Device 002: ID 8087:8008 Intel Corp.
Bus 004 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 0bda:818b Realtek Semiconductor Corp.

通过百度等搜索DeviceID 为0bda:818b 对应的驱动为 rtl8192eu

下载源码并编译安装：

make clean

make

make install

源码编译出现错误，可能是linux内核版本不匹配，建议重新查找相关资源下载

通过命令lsmod | grep 8192  查看驱动是否安装好

[root@localhost 桌面]# lsmod | grep 8192
8192eu                953074  0

二、通过wireless_tools连接wifi

通过百度等搜索wireless_tools.29 下载源码并编译安装

使用命令：

make && make install

使用查看无线网卡配置：iwconfig

[lucasyao@localhost ~]$ iwconfig
enp3s0    no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"YAO123456"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.452 GHz  Access Point: C8:94:BB:D0:6A:FC   
          Bit Rate:54 Mb/s   Sensitivity:0/0  
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=98/100  Signal level=99/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

左边显示的是网卡接口名

扫描附近的Wifi热点：iwlist wlan0 scan | grep -i ssid

[lucasyao@localhost ~]$ iwlist wlan0 scanning | grep -i ssid
                    ESSID:"不是你的网你连啥？"
                    ESSID:"YAO123456"

若wifi需要密码，可以建立一个文件保存密码：

vi /etc/wpa_supplicant/wpa_supplicant.conf

内容为：

network={
        ssid="YAO123456"
        key_mgmt=WPA-PSK
        psk="你的密码"
        priority=1
}

然后通过命令进行连接：

wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf

若通过后台连接可加上 -B

连接上之后使用dhcp进行分配IP：

dhclient wlan0

之后通过ifconfig 查看连接情况：

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.13  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::32b4:9eff:fe68:ca8a  prefixlen 64  scopeid 0x20<link>
        ether 30:b4:9e:68:ca:8a  txqueuelen 1000  (Ethernet)
        RX packets 4747  bytes 4125306 (3.9 MiB)
        RX errors 0  dropped 221  overruns 0  frame 0
        TX packets 4074  bytes 768662 (750.6 KiB)
        TX errors 0  dropped 29 overruns 0  carrier 0  collisions 0