The latest version of the Ubuntu operating system for desktop PCs and laptops, Ubuntu 14.04.1 LTS comes with five years of security and maintenance updates, guaranteed.
The release notes for Ubuntu 14.04.1 (Trusty Tahr) provide an overview of the release and document the known issues with Ubuntu 14.04.1 and its flavors. For details of the changes applied since 14.04.0, please see the 14.04.1 change summary. The release notes for 14.04 are available as well.
Support lifespan: Ubuntu 14.04 LTS will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, Ubuntu Core, Kubuntu, Edubuntu, and Ubuntu Kylin. All other flavours will be supported for 3 years.