Book Image

Red Hat Enterprise Linux 9 Administration - Second Edition

By : Pablo Iranzo Gómez, Pedro Ibáñez Requena, Miguel Pérez Colino, Scott McCarty
2 (2)
Book Image

Red Hat Enterprise Linux 9 Administration - Second Edition

2 (2)
By: Pablo Iranzo Gómez, Pedro Ibáñez Requena, Miguel Pérez Colino, Scott McCarty

Overview of this book

With Red Hat Enterprise Linux 9 becoming the standard for enterprise Linux used from data centers to the cloud, Linux administration skills are in high demand. With this book, you’ll learn how to deploy, access, tweak, and improve enterprise services on any system on any cloud running Red Hat Enterprise Linux 9. Throughout the book, you’ll get to grips with essential tasks such as configuring and maintaining systems, including software installation, updates, and core services. You’ll also understand how to configure the local storage using partitions and logical volumes, as well as assign and deduplicate storage. You’ll learn how to deploy systems while also making them secure and reliable. This book provides a base for users who plan to become full-time Linux system administrators by presenting key command-line concepts and enterprise-level tools, along with essential tools for handling files, directories, command-line environments, and documentation for creating simple shell scripts or running commands. With the help of command line examples and practical tips, you’ll learn by doing and save yourself a lot of time. By the end of the book, you’ll have gained the confidence to manage the filesystem, users, storage, network connectivity, security, and software in RHEL 9 systems on any footprint.
Table of Contents (26 chapters)
1
Part 1 – Systems Administration – Software, User, Network, and Services Management
9
Part 2 – Security with SSH, SELinux, a Firewall, and System Permissions
14
Part 3 – Resource Administration – Storage, Boot Process, Tuning, and Containers
21
Part 4 – Practical Exercises

Summary

By learning the basics of OpenSCAP, we are ready to review and harden systems to make them compliant with the regulations we need them to run under.

Now, if you are requested to comply with any regulatory requisitions, you can find the right SCAP profile for it (or build it if it doesn’t exist) and ensure that your systems are fully compliant.

Also, even when no regulatory requirements apply, the use of OpenSCAP can help you find vulnerabilities in a system, or apply a more secure (and restrictive) configuration to your systems in order to reduce the risks.

There are ways to extend our knowledge and skills by learning Ansible and being able to automatically apply changes to our systems in a way that is easy to scale, as well as Red Hat Satellite, which can help run SCAP scans to the whole information technology (IT) base we are managing, even when we could be talking about thousands of systems.

Now that our security skills are improving and being consolidated...