An in-depth article that covers almost all the questions around using PPA in Ubuntu and other Linux distributions.
Free and Open Source SSH client Putty is also available for Linux users. Learn how to install Putty on Ubuntu and other Linux distributions in this tutorial.
This tutorial shows you how to update Ubuntu for both server and desktop versions. It also explains the difference between update and upgrade along with a few other things you should know about updates in Ubuntu Linux.
The long-term support (LTS) releases of Ubuntu used to get support for five years. This is changing now. Ubuntu 18.04 will now be supported for ten years. Other LTS releases might also get an extended support.
This step by step tutorial shows you how to type Indian Rupee Symbol on Ubuntu 18.04 with GNOME desktop. The procedure should also be applicable to other desktop environments and Linux distributions as well.