Hadoop Setup Cool Links:
Found some cool links to setup hadoop on Virtualbox.

Found that cloning the machine before setting up will save us a good amount of effort just is case some steps are not followed properly.

http://cs.smith.edu/dftwiki/index.php/Setup_Virtual_Hadoop_Cluster_under_Ubuntu_with_VirtualBox


sudo -s
editor/nano/vi /etc/hostname
editor/nano/vi /etc/hosts
shutdown -ry now

Although everything after Download hadoop from hadoop directory should be from:
http://codesfusion.blogspot.com/2013/10/setup-hadoop-2x-220-on-ubuntu.html 

Actually this one is  better than the second link:
https://www.digitalocean.com/community/articles/how-to-install-hadoop-on-ubuntu-13-10