Ubuntu 20.04 connects to wifi (2 methods)

I recently installed Ubuntu 20.04 and found that I could not connect to wifi and there was no wifi icon. It seems that there is no driver.

Solution

Method 1

1. Connect the computer with an Ethernet cable first

2. Execute in the terminal

sudo apt update

3. Execute in terminal

sudo apt-get install bcmwl-kernel-source

4. Restart

Method 2

#List your network ip a

There is a YAML configuration file under /etc/netplan/

Modify the configuration file

ubuntu@ubuntu:~$ cat /etc/netplan/50-cloud-init.yaml
 
network:
  ethernets:
    eth0:
      dhcp4: true
      optional: true
  version: 2
  Wifis:
      wlan0:
          dhcp4: true
          access-points:
              "Your wifi's ssid":
                  password: "your password"

netplan try
netplan apply

I restarted it then.

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