Question: can ubuntu run on raspberry pi 4?
Answer: Ubuntu currently supports Raspberry Pi 2, Raspberry Pi 3, and Raspberry Pi 4 models, and images are available for Ubuntu 18.04. 4 LTS (Bionic Beaver), which is the latest LTS (Long-Term Support) release supported until April 2023, and Ubuntu 19.10 (Eoan Ermine), supported until July 2020.