So Ubuntu 12.04 64bit/amd64 virtual machines are now available for VirtualBox (VDI) and VMware (VMDK). Ubuntu’s proud tradition of integrating the latest and greatest open source technologies into a high-quality, easy-to-use Linux distribution.
Download Ubuntu 12.04.5 LTS - Free Linux Downloads Download Ubuntu - This is the Ubuntu Linux distribution, the world's most popular free operating system! This is a Long Term Support edition of Ubuntu, also known Precise Pangolin or Ubuntu 12.04 LTS. Distributed as Desktop and Alternate Live CDs. Download Ubuntu 12.10 - Free Linux Downloads Download Ubuntu - The Quantal Quetzal edition of the world's most popular free operating system, Ubuntu Linux Ubuntu 12.10 is an open source Linux distribution based on the Debian GNU/Linux operating system and built around the Unity 3D desktop environment created by Canonical specifically
Ubuntu 14.04.6 LTS (Trusty Tahr)
Download Raspberry Pi 2 & 3 Version (16.04) This image was created using the Ubuntu Pi Flavour Maker. For the Raspberry Pi 2 the microSDHC I/O throughput is a bottleneck. Recommended: Use a Class 6 or Class 10 microSDHC card. More information here. lubuntu Raspberry Pi 2. Download Version 16.04.3 LTS. The Longterm Support (LTS) version. Ubuntu 12.04.5 LTS (Precise Pangolin) - nl.releases.ubuntu.com
How to Install Ubuntu 12.04: 10 Steps (with Pictures