Ubuntu Lunar wifi client

Wireless configuration under Ubuntu, similar to Ethernet, also uses netplan for configuration. For example, create /etc/netplan/wifi.yaml:

network:
  version: 2
  renderer: networkd
  wifis:
    wlan0:
      dhcp4: yes
      dhcp6: yes
      access-points:
        "yourssid":
          password: yourpassphrase"

After creating the yaml file, set the appropriate permissions and apply the netplan:

sudo chmod 600 /etc/netplan/*.yaml
sudo netplan apply