Can install a test machine with Oracle 11G R2, not express edition, on a VirtualBox? Im starting like a Oracle DBA, and I want play with the database and your administration task in a test enviroment.

I have a macbook pro i5, and had thought install on it oracle under virtual box machine.


What distro of linux your recommends me to start?
I can install Oracle RAC in a Vbox machine?
Some handbook? 
Other considerations...


I appreciate all your comments, and excuse my poor english D:
Most of your questions are covered in official documentation.
http://docs.oracle.com/cd/E11882_01/nav/portal_11.htm

Read the installation guide (NOT the "quick installation" one).

I don't recommend using "pre-built" virtual machines - try to install OS and db from scratch. The process is the same as installing on "real" hardware. Use CentOS as mentioned in comments.

Not sure for RAC, but Data Guard works perfectly.

Good luck and have fun :)