First you should configure your new environment (Linux RAC 11g). Configure your new RAC and get all pendencies concluded ...
To migrate you can use some options:
- TTS (transportable tablespace)
You should attend some documentations about it. For RAC you'll need to execute a whole new installation process...
There's a Lot of documentation on the web about how to install RAC 11gR2.
The best way is to use the RACGuides for any Platform:
RAC and Oracle Clusterware Best Practices and Starter Kit (Platform Independent) (Doc ID 810394.1)
Edited by: Victor Armbrust on 28/12/2012 12:43