Ubuntu2004采用netplan模块来管理网络，以下是netplan如何设置无线网卡连接的方法

首先使用 ip -a 确认自己的无线网卡设备名称，如我的无线网卡名称如下

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    	...
       valid_lft forever preferred_lft forever
4: wlp0s20f3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 38:00:25:a4:b3:25 brd ff:ff:ff:ff:ff:ff
    inet 192.168.12.221/24 brd 192.168.12.255 scope global dynamic wlp0s20f3
       valid_lft 70528sec preferred_lft 70528sec
    inet6 fe80::3a00:25ff:fea4:b325/64 scope link 
       valid_lft forever preferred_lft forever

编辑 /etc/netplan/01-network-manager-all.yaml 文件如下

network:
     version: 2
     renderer: networkd
     wifis:
       wlp0s20f3:
         dhcp4: yes
         access-points:
           "WIFINAME":
             password: "PASSWORD"
     ethernets:
       eno1:
               dhcp4: yes

应用设置

sudo netplan apply

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Ubuntu2004连接无线网络（命令行配置）

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