Chapter 1. Preface

This document provides an overview of differences between two major versions of Red Hat Enterprise Linux: RHEL 8 and RHEL 9. It provides a list of changes relevant for evaluating an upgrade to RHEL 9 rather than an exhaustive list of all alterations.

For details regarding RHEL 9 usage, see the RHEL 9 product documentation.

For information about major differences between RHEL 7 and RHEL 8, see Considerations in adopting RHEL 8.