The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

Chapter 2 Secure Installation and Configuration

This chapter outlines the planning process for a secure installation and describes how the choices that you make during installation affect system security.