WinRAR installation on Ubuntu

Solution 1:

WinRAR is a windows program for using RAR type files. There is no 'WinRAR' on Ubuntu.

Installing rar like you did should add support for RAR files into the standard "archive manager" for ZIPS, TARs, etc.

(copied from William Fleming, he got some of my upvote power for his answer)
Installing unrar will help you with unpacking them: sudo apt-get install unrar

Solution 2:

sudo apt-get install unrar

This will allow you to unpack them.

Solution 3:

Two ways to install WinRAR in Ubuntu:

Method 1: Install the available rar and unrar tools

In the Terminal type:

sudo apt-get update
sudo apt-get install rar unrar
sudo apt-get clean

It will install the rar software and after installation, it will open rar files in the archive manager

Method 2: Install wine and then WinRAR

Install wine and download the winrar.exe from WinRAR website and install the WinRAR software similar steps to be followed for the installation in windows and after that rar files are able to open

For more details see this blog post.