DebugPoint published a tutorial about installing Viber in Ubuntu Linux.
How to Install Viber in Ubuntu and Other Linux
Here’s a quick guide on how you can install Viber in Ubuntu and other Linux systems. Viber is a free, secure calling and messaging program for all popular mobile platforms and operating systems. It has a rich set of features such as voice/video calls, text messages with GIFs, stickers, photos, and videos.