How to install Ubuntu Mate 20.04.1 LTS on external SSD and run it from USB on Raspberry Pi 4

[Norbert_X]

You can follow the corresponding guide, I have tested it on my RPi 4B with 4 Gb of RAM

Activating USB boot for Ubuntu MATE 20.04 LTS on Raspberry Pi 4

It is known that modern Ubuntu MATE 20.10 is capable to boot from USB. If you want to upgrade 20.10 to 21.04 by sudo do-release-upgrade or update-manager -c , the resulting system will be able to boot from USB too. This is true for both 32-bit (armhf) and 64-bit (arm64). But what is about Ubuntu MATE 20.04 LTS? The below guide shows how to boot existing Ubuntu MATE 20.04.1 LTS from USB. Using 32-bit armhf image What should we do: Install updated bootloader into RPi, see this guide for com…