Canonical has released the new version of Ubuntu 19.04 on 18 April, 2019. Lets see the information of this brand new OS.
Ubuntu 19.04 (Disco Dingo) is the latest release which has official support until January 2020 as declared by the Canonical. So if you want to use it for long term then it will be better to use 18.04 LTS.
You can download this OS from this link http://releases.ubuntu.com/19.04/
If you want to upgrade your current Ubuntu version then you can go to the software & updates and click for check for updates, then select the update and install it.
New features in 19.04