How to uncompress a RAR file

Windows

Download and install winrar http://www.win-rar.com/download.html
more info on https://www.win-rar.com/faq.html

Linux (Ubuntu 16)

Use synaptic and search unrar-free
or close synaptic and use this command on a terminal:

sudo apt-get install unrar-free

macOS

Download and use:

• The Unarchiver ?

• unrarx ?

Android

Download and use ES file explorer you can get with "google play".