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Linux Service Management Made Easy with systemd

You're reading from   Linux Service Management Made Easy with systemd Advanced techniques to effectively manage, control, and monitor Linux systems and services

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Product type Paperback
Published in Feb 2022
Publisher Packt
ISBN-13 9781801811644
Length 420 pages
Edition 1st Edition
Tools
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Author (1):
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Donald A. Tevault Donald A. Tevault
Author Profile Icon Donald A. Tevault
Donald A. Tevault
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Table of Contents (23) Chapters Close

Preface 1. Section 1: Using systemd
2. Chapter 1: Understanding the Need for systemd FREE CHAPTER 3. Chapter 2: Understanding systemd Directories and Files 4. Chapter 3: Understanding Service, Path, and Socket Units 5. Chapter 4: Controlling systemd Services 6. Chapter 5: Creating and Editing Services 7. Chapter 6: Understanding systemd Targets 8. Chapter 7: Understanding systemd Timers 9. Chapter 8: Understanding the systemd Boot Process 10. Chapter 9: Setting System Parameters 11. Chapter 10: Understanding Shutdown and Reboot Commands 12. Section 2: Understanding cgroups
13. Chapter 11: Understanding cgroups Version 1 14. Chapter 12: Controlling Resource Usage with cgroups Version 1 15. Chapter 13: Understanding cgroup Version 2 16. Section 3: Logging, Timekeeping, Networking, and Booting
17. Chapter 14: Using journald 18. Chapter 15: Using systemd-networkd and systemd-resolved 19. Chapter 16: Understanding Timekeeping with systemd 20. Chapter 17: Understanding systemd and Bootloaders 21. Chapter 18: Understanding systemd-logind 22. Other Books You May Enjoy

Verifying the status of a service

I'll be using Alma Linux for this first demo, for a reason that will become clear in just a moment. First, let's install the Apache web server by doing the following:

sudo dnf install httpd

Before you can start using Apache, you'll want to know whether it's enabled, so that it will automatically start when you reboot the machine. You'll also want to know whether it's active, which just means that it's running.

To see whether it's enabled, do the following:

[donnie@localhost ~]$ systemctl is-enabled httpd
[sudo] password for donnie: 
disabled
[donnie@localhost ~]$

Here, you see why I'm using a RHEL-type distro for this. When you install a service on any RHEL-type machine, it's normally disabled by default. When you install a service on Ubuntu, it's normally enabled by default. So, by doing this on Alma Linux, I can give you more to look at.

Next, let's see whether Apache is...

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