These release notes for Ubuntu 18.04 LTS (Bionic Beaver) provide an overview of the release and document the known issues with Ubuntu 18.04 LTS and its flavors
The ‘main’ archive of Ubuntu 18.04 LTS will be supported for 5 years until April 2023. Ubuntu 18.04 LTS will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, Ubuntu Core, and Ubuntu Kylin. Ubuntu Studio 18.04 will be supported for 9 months. All other flavors will be supported for 3 years.
Official flavor release notes
Find the links to release notes for official flavors here.
ubuntu-18.04-desktop-amd64.iso (23 downloads)