Install unrar-free by entering the following commands in the terminal:
sudo apt update sudo apt install unrar-free
Description:
Unarchiver for .rar files
Unrar can extract files from .rar archives. Can't handle some archives in the RAR 3.0 format natively. Package "unar" can be used to extract those archives if installed.
Homepage: https://gna.org/projects/unrar/
Version: 1:0.0.1+cvs20140707-4
Section: universe/utils