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 logind.conf

The /etc/systemd/logind.conf file is the configuration file for the systemd-logind service. Now, before we get too far, I want to recommend that you use a text-mode virtual machine for this section. The demos will have you make several changes to the logind.conf file, and you'll need to restart the systemd-logind service after each one. If you do that on a graphical mode machine, you'll get logged out of the desktop, and will have to log back in. The desktop doesn't always come back up correctly, and you'll end up having to restart the machine. With a text-mode machine, that isn't a problem. So, since the Ubuntu Server machine is already in text mode, we'll use it for the demos.

The good news is that the logind.conf file is identical on both the Ubuntu machine and the Alma machine. Here's what it looks like:

Figure 18.1 – The logind.conf file

As is the case with all of the configuration...