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

Viewing the networkd and resolved unit files

Before we go, I'd like you to take a quick look at the unit files for networkd and resolved. Here's the list of them:

[donnie@localhost system]$ pwd
/lib/systemd/system
[donnie@localhost system]$ ls -l *networkd*
-rw-r--r--. 1 root root 2023 Jun  6 22:26 systemd-networkd.service
-rw-r--r--. 1 root root  640 May 15 12:33 systemd-networkd.socket
-rw-r--r--. 1 root root  752 Jun  6 22:26 systemd-networkd-wait-online.service
[donnie@localhost system]$ ls -l *resolved*
-rw-r--r--. 1 root root 1668 Aug 10 17:19 systemd-resolved.service
[donnie@localhost system]$

I'm not going to take the time to trace through them for you because by now, you should be able to do that yourself. I mean, it's mainly a matter of looking everything up in the systemd.directives man page, as we've done quite a few times before. Once you've done that, we'll wrap this baby up.