Book Image

Linux Service Management Made Easy with systemd

4 (1)
Book Image

Linux Service Management Made Easy with systemd

4 (1)

Overview of this book

Linux Service Management Made Easy with systemd will provide you with an in-depth understanding of systemd, so that you can set up your servers securely and efficiently.This is a comprehensive guide for Linux administrators that will help you get the best of systemd, starting with an explanation of the fundamentals of systemd management.You’ll also learn how to edit and create your own systemd units, which will be particularly helpful if you need to create custom services or timers and add features or security to an existing service. Next, you'll find out how to analyze and fix boot-up challenges and set system parameters. An overview of cgroups that'll help you control system resource usage for both processes and users will also be covered, alongside a practical demonstration on how cgroups are structured, spotting the differences between cgroups Version 1 and 2, and how to set resource limits on both. Finally, you'll learn about the systemd way of performing time-keeping, networking, logging, and login management. You'll discover how to configure servers accurately and gather system information to analyze system security and performance. By the end of this Linux book, you’ll be able to efficiently manage all aspects of a server running the systemd init system.
Table of Contents (23 chapters)
Section 1: Using systemd
Section 2: Understanding cgroups
Section 3: Logging, Timekeeping, Networking, and Booting

Understanding the improvements in cgroup Version 2

Version 2 is a bit more streamlined and simpler to understand. At the time of writing, Fedora, Arch, and Debian 11 are the only three Linux distros of which I know that run cgroup Version 2 by default (that will likely change by the time you read this).


It is possible to convert RHEL 8-type distros, such as Alma and Rocky, over to a pure Version 2 setup. Unfortunately, the RHEL-type distros use an older implementation of Version 2 that still doesn't have all of the resource controllers that we need enabled. So, to see everything that we need to see, we'll use Fedora.

To begin, let's log in to the Fedora machine and create a user account for my buddy Pogo (Pogo is the awesome opossum who comes in through my cat door at night to chow down on the cat food – Yes,seriously.) Then,Then, have Pogo log in from a remote terminal (Note that on Fedora, you might have to start and enable the sshd service first...