These release notes for Ubuntu 18.04.3 LTS (Bionic Beaver) provide an overview of the release and document the known issues with Ubuntu 18.04 LTS and its flavors. For details of the changes applied since 18.04, please see the 18.04.3 change summary. The release notes for 18.04, 18.04.1, and 18.04.2 are available as well.
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, and Ubuntu Core. 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-desktopubuntu-18.04.3-desktop-amd64.iso (598 downloads)