oracle preinstall RPM

Oracle 12c R1 and R2 is certified to install on Oracle Linux 6 or 7 and use Oracle RPM, This RPM installs all required packages, sets kernel parameters for the installation of Oracle database and grid infrastructure. oracle-database-server-12cR2-preinstall is the RPM configures server ready for the installation of database and grid infrastructure.

Steps to install  oracle preinstall RPM

Download the Oracle linux 6 or 7 from edelivery.oracle.com
Once downloaded, start the installation with the appropriate selections for your environment.
During the installation process, Select customize now option in the software selection window.
On Oracle Linux, Select servers on the left pane of the screen and system administration on the right pane of the screen and then packages in system tools window will open.
Select Oracle Preinstallation RPM package box from the package list.
For Oracle Linux 7 select package similar to oracle-database-server-12cR2-preinstall-1.0-4.el7.x86_64.rpm
Close the optional package window and go with next steps.