You can use the following RPM packages to complete basic operating system configuration.
Oracle Linux Preinstallation RPM with ULN Support
Oracle Preinstallation RPM for your Oracle Linux 6 or Oracle Linux 7 kernel (oracle-rdbms-server-12cR2-preinstall).
Unbreakable Linux Network (ULN) customers can obtain the Oracle Preinstallation RPM by using yum.
Oracle Linux Preinstallation RPM Without ULN Support
Oracle Linux packages on the Oracle Linux yum server website: