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

Practice exercise 2

Important note

By design, in the following exercise, commands, packages, and so on will not be highlighted. Remember what you’ve learned so far to detect the keywords to see what needs to be done.

Don’t jump into the solution too early; try to think about it and remember what was covered.

Exercises

  1. Download the necessary file from this book’s GitHub repository at https://raw.githubusercontent.com/PacktPublishing/Red-Hat-Enterprise-Linux-RHEL-9-Administration/main/chapter-19-exercise2/users.txt.
  2. Use the users.txt file to generate users in the system in an automated way using the values provided, in the following order: username, placeholder, uid, gid, name, home, shell.
  3. Create a group named users and add that group as the primary group to all users, leaving their own groups, named after each user, as secondary groups.
  4. Change the home folders for the users so that they are group-owned.
  5. Set up an HTTP server and...