Ubuntu 14.04 is reaching its end of life on April 30, 2019. This means there will be no security and maintenance updates for Ubuntu 14.04 users beyond this date.
You won’t even get updates for installed applications and you won’t be able to install a new application using apt command or the Software Center without manually modifying the sources.list.
Ubuntu 14.04 was released almost five years ago. That’s the life of a long term support release of Ubuntu.
Check Ubuntu version and see if you are still using Ubuntu 14.04. If that’s the case either on desktops or on servers, you might be wondering what should you do in such a situation.
Let me help you out there. Let me tell you what options do you have in this case.
Upgrade to Ubuntu 16.04 LTS (easiest of them all)
If you have a good internet connection, you can upgrade to Ubuntu 16.04 LTS from within Ubuntu 14.04.
Ubuntu 16.04 is also a long term support release and it will be supported till April 2021. Which means you’ll have two years before another upgrade.
I recommend reading this tutorial about upgrading Ubuntu version. It was originally written for upgrading Ubuntu 16.04 to Ubuntu 18.04 but the steps are applicable in your case as well.
Make a backup, do a fresh install of Ubuntu 18.04 LTS (ideal for desktop users)
The other option is that you make a backup of your Documents, Music, Pictures, Downloads and any other folder where you have kept essential data that you cannot afford to lose.