Extracting RAR files on Ubuntu

I recently installed Ubuntu on my machine.
I had Vista earlier. I was fed up of Vista.

This is Ubuntu is awesome. Never gets freezed.

I got some ebooks, I needed urgently, from one of my friends. But it was in .RAR format.

I was wondering if there's any RAR extractor for Linux.

I used to use WinRAR on Windows.

I searched online and found the command to install it on my machine.
It's simple.

Open your Terminal (On Ubuntu: Application -> Terminal)
Type: sudo apt-get install unrar

and it's done.

How to use UNRAR?

Type: unrar help
You will see bunch of options that can be used with unrar.

To just extract the files on your current drive, use..
UNRAR e filename.rar