Bedrock V3000 does not have a display, so Ubuntu installation requires connecting Bedrock to a host PC using a console (serial over USB).
This document describes Ubuntu installation process on Bedrock V3000.
The installation was validated at SolidRun using the following setup:
Ubuntu server 22.04
Ubuntu server 23.04
Alternatively, Tio can also be used. known TIO limitation: in BIOS, the currently selected option is displayed in the same color as the background, which makes it not visible yet it is still fully functional.