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

RHEL subscription registration and management

RHEL is a fully open source operating system, which means that all the source code used to build it is available to access, modify, redistribute, and learn from. Pre-built binaries are, on the other hand, delivered as a service, and accessible via a subscription. As seen in Chapter 1, Getting RHEL Up and Running, we can have, for our own personal use, a developer subscription. That subscription provides access to ISO images, but also to the updated, signed packages that are part of RHEL 9. These are the exact same bits that are used in production by so many companies worldwide.

Let’s see how to use that subscription with our own system.

First, let’s take a look at the Red Hat Customer Portal at https://access.redhat.com and click LOG IN:

Figure 7.1 – Log in to the Red Hat Customer Portal

Once we click on LOG IN, we will be redirected to the Single Sign-On (SSO) page for all the Red Hat...