Ubuntu Cloud Images 16.10 Release Build
As announced, Ubuntu Yakkety has reached the end of it's life.
Ubuntu Cloud Images are the official Ubuntu images and are pre-installed disk images that have been customized by Ubuntu engineering to run on public clouds that provide Ubuntu Certified Images, Openstack, LXD, and more.
For more information, please see the following:
Ubuntu Server 16.10 (Yakkety Yak) Release Builds