I observed that people are looking for install rar on nautilus.

In fact, it’s very simple, first, we open rarlab page.

We have to choose between the ‘normal’ (x32) and ’64 bits’ (x64) version.

What is your architecture ?  You can know that by typing these command.

uname -i
x86_64

Here, is a 64 bits architecture and I will download the right file (x64) (32 bits version is here).

Open a CLI, and go to file. After that, you must extract and install.

$tar zxvf rarlinux-x64-3.9.2b1.tar.gz #extract

$cd rar/ #go into directorycreated

$su #switch in root mode

#make install #simply install

It finished, enjoy it.