There are few ways to check which version of Ubuntu you are running. You can check with GUI and Terminal
Checking your Ubuntu version from GUI
Click on Settings menu either from top right menu or from button in left launcher.
Then...
Install Ubuntu 16.10 in VirtualBox
These release notes for Ubuntu 16.10 (Yakkety Yak) provide an overview of the release and document the known issues with Ubuntu 16.10 and its flavors. Support lifespan Ubuntu 16.10 will be supported for 9 months until July 2017. If you need...