During the BGOUG event I have discovered a lot of new features which should be tested and validated and this make me drive to install new version of Oracle 12cR2 :)
You can simple download - Oracle Database 12c Release 2 Enterprise Edition and Oracle Database 12c Release 2 Standard Edition from following link -> http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html

In order to install Oracle Software there are requirement to install Linux or other supported OS/platform and configure as per the vendor pre-requisites
Very useful starting point for all required pre-requisites - https://oracle-base.com/articles/12c/oracle-db-12cr2-installation-on-oracle-linux-6-and-7