Oracle 11gr2 two node real application cluster installation guide on linux using Virtual Box 4.1.4
Here I just demonstrated how do we install two node rac on oracle Virtual Box.
Please refer before you try to install rac on virtual box.
Vmware Server rac installation guide , click below url.
Oracle Virtual Box 4.1.4
Download the below pdf document, I hope this document will helpful for you.
Download right click on this URL , choose save target as and save it.