Am new to linux system what are the fundamental steps needed ?

Fundamental steps to do what? Please explain what you have, and what you would like to do. To get a good answer, you will have to attempt to show that you are interested enough to be thorough in your question at least.

Hi,
Welcome to LQ!

I like to provide these links to new users;Have fun & enjoy!
Hope this helps.

Welcome to LQ! A good start is choosing a distro and installing it — have you done that yet? If you haven't, I suggest you start with Linux Mint. It's very beginner-friendly, has lots of users to help if you get into difficulties, is tolerant of most software, and doesn't have any features that seriously antagonise anyone.

You'll need to defrag and shrink your windows installation to free up space for Linux partitions. That's explained here
http://www.dedoimedo.com/computers/gparted.html
The program Gparted will be on the Mint installation medium.

Here's where you get an installation guide
http://www.linuxmint.com/documentation.php

and here's the place to download the installation image
http://www.linuxmint.com/download.php
You can put the image on a DVD or USB stick, as explained in the guide. Mint can then be run (rather slowly) from the installation medium, so you can try before you commit yourself to installing.

Have fun!