To be able to setup Wifi on Raspberry Pi 4 B+ 4GB on Ubuntu server 18 TLS, you first need to get the name of the Wifi card by showing physical components using the following command:
$ sudo lshw
in my case it was wlan0
Then navigate to /etc/netplan/ using the cd command the hit Enter
$ cd /etc/netplan/
Use the command ls to list the files and directories under the folder then you now have to edit the .yaml file:
$ sudo nano 50-cloud-init.yaml
Finally, add the following lines to the 50-cloud-init file:
wifis: wlan0: optional: true access-points: "SSID-NAME": password: "WIFI-PASSORD" dhcp4: yes
NOTE: Make sure not to use tab for space, use the spacebar to create the blank.
Here is the final file code:
network: ethernets: eth0: dhcp4: true optional: true version: 2 wifis: wlan0: optional: true access-points: "SSID-NAME": password: "WIFI-PASSORD" dhcp4: yes
Change the SSID-NAME and the WIFI-PASSORD they have to be in quotes. The : after SSID name is required.
Close and save the file using ctrl+x and yes by tipping the letter y
Finally, you need to do some debugs:
$ sudo netplan –debug try $ sudo netplan –debug generate $ sudo netplan –debug apply
then reboot the pi
$ sudo reboot
Install Ubuntu desktop with the following command:
$ sudo apt-get install ubuntu-desktop
