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)
1
Section 1: Using systemd
12
Section 2: Understanding cgroups
16
Section 3: Logging, Timekeeping, Networking, and Booting

Understanding the systemd configuration files

In this section, we'll look at the configuration files that control how the various components of systemd operate. If you want to follow along with your own VM, it won't much matter which distro you have because things will be mostly the same across all systemd-enabled distros. Okay—so now you're yelling at me, saying:

Mostly the same? Why, Donnie, you told us before that systemd is implemented consistently across all distros! What gives?

Well, it is consistent, in that the management and control commands are the same across all distros, but the systemd ecosystem includes several different components besides just the init system. These components are optional, and some Linux distros don't use all of them in a default configuration. Several of these components have configuration files in the /etc/systemd/ directory, as you can see here:

[donnie@localhost systemd]$ pwd
/etc/systemd
[donnie@localhost systemd...