Ubuntu is a Debian-based Linux distribution developed by Canonical, available in desktop and server editions.
LTS releases are supported for five years with security updates, while interim releases are supported for nine months and include newer features.
sudo apt update
sudo apt upgrade
Use the release upgrade tool:
sudo do-release-upgrade
Yes. Ubuntu includes Snap support by default alongside traditional APT packages.
Ubuntu documentation, community forums, and Ask Ubuntu are the main support resources.