Download & Flash

Flash Image

Download, install & open Raspberry Pi Imager. Plug in your target USB drive.

Ubuntu users can download and install with snapd.

>_ Terminal

sudo apt update
sudo apt install snapd
sudo snap install rpi-imager

danger

Older models of the Pi4B 8GB need to have their boot loader updated to boot from USB. If your image won't boot remove the USB3 drive and use rpi-imager to flash Pi 4 EEPROM boot recovery to an sd card.

Plug the Pi into a monitor, insert the sd card and power up. Once you see a green screen you should be good to boot from your USB3 drive. Newer versions are shipping with a USB boot capable boot loader. Feeling lucky?

Choose OS -> Misc utility images -> Bootloader -> USB Boot

https://www.raspberrypi.org/documentation/hardware/raspberrypi/booteeprom.md

Pre configured Pi-Node.img.gz

Obtain Pi-Node.img.gz file

Download Pi-Node

Within Raspberry Pi Imager

Choose OS -> Use custom

Locate the .img.gz file you downloaded & wish to flash.

Locate your target drive & write it to disk.

Fresh Ubuntu 22.04 LTS installation

Within Raspberry Pi Imager

Download Ubuntu Server 22.04 (RPI 3/4/400)

Raspberry Pi Generic (64-bit ARM) preinstalled server image

Choose OS -> Use custom

Locate the .img.gz file you downloaded & wish to flash. Locate your target drive & write it to disk.