Enterprise Linux 7 Preparing for Oracle 12c Database Installation Guide
The Tip Simply Shows How to Prepare a Linux Red-Hat/RHEL and CentOS 7.x x8664 System for Oracle 12c R1/R2 Database Installation.
In other Words this Meaning How To Install the Oracle 12c DB Pre-Install RPM for Enterprise Linux 7.
Tasks for What the Oracle Pre-Install RPM is Good:
Automatically downloads and installs any additional RPM packages needed for installing Oracle Grid Infrastructure and Oracle Database, and resolves any dependencies
Creates an oracle user, and creates the oraInventory (oinstall) and OSDBA (dba) groups for that user
As needed, sets sysctl.conf settings, system startup parameters, and driver parameters to values based on recommendations from the Oracle RDBMS Pre-Install program
Sets hard and soft resource limits
Sets other recommended parameters, depending on your kernel version
First, Convert, Download and Activate the Oracle Repository like Shown in the Guide here Beneath.