Ubuntu MATE ARM 64 update from 20.10
How do I update from MATE 20.10 to the updated version on Rasp PI 4?
Upgrade from Ubuntu MATE 20.10 to 21.04 is possible by
sudo apt-get update
sudo apt-get dist-upgrade
followed by reboot and one of the following commands
-
in GUI mode
update-manager -c -
in TTY mode
sudo do-release-upgrade
Note: the above method is universal for both amd64 and RaspberryPi (arm64 or armhf).