How to set up WIFI on Ubuntu running on the Raspberry PI 4

First step is to check the status of the interfaces. For this, we will use the net-tools package.

sudo apt install net-tools

Then, we can see the interfaces status

ifconfig -a

In my case, I have this status of my interface wlan0:

ubuntu@ubuntu:~$ ifconfig -a wlan0
wlan0: flags=4098<BROADCAST,MULTICAST> mtu 1500
        ether dc:a6:32:6c:xx:xx txqueuelen 1000 (Ethernet)
        RX packets 0 bytes 0 (0.0 B)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 0 bytes 0 (0.0 B)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

In the flags only there are 2 (BROADCAST,MULTICAST), but there is no “UP” flag.

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How to install Ubuntu in your Raspberry Pi 4 without Keyboard nor screen

To install Ubuntu in your Raspberry Pi 4 what you need is:

  • Raspberry Pi 4
  • USB-C cable
  • Mini SD Card (recommended 16 Gb or more)
  • PC
  • Mini SD Card reader in your PC
  • RJ45 Ethernet cable
  • Switch or Router of your network

The first step is to install Ubuntu software in your SD Card. For this, you shoud go to the Raspberry Pi Downloads page, and download the Raspberry Pi Imager.

Once installer the imager, it is needed to select the Operating System (In our case Ubuntu 19.10.1), and the SD Card.

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