Finding out what version of Ubuntu you are running will help you choose which package installer to download. 

The easiest and quickest way to find out your Ubuntu version is to go into the Terminal and run the cat /etc/*-release command.

You should now see some output on the screen. There are a few sections we can focus on these are DISTRIB_DESCRIPTION, VERSION, and VERSION_ID. In my case, it is Ubuntu version 16.04.