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Linux System Programming Techniques

You're reading from   Linux System Programming Techniques Become a proficient Linux system programmer using expert recipes and techniques

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Product type Paperback
Published in May 2021
Publisher Packt
ISBN-13 9781789951288
Length 432 pages
Edition 1st Edition
Tools
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Author (1):
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Jack-Benny Persson Jack-Benny Persson
Author Profile Icon Jack-Benny Persson
Jack-Benny Persson
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Table of Contents (14) Chapters Close

Preface 1. Chapter 1: Getting the Necessary Tools and Writing Our First Linux Programs 2. Chapter 2: Making Your Programs Easy to Script FREE CHAPTER 3. Chapter 3: Diving Deep into C in Linux 4. Chapter 4: Handling Errors in Your Programs 5. Chapter 5: Working with File I/O and Filesystem Operations 6. Chapter 6: Spawning Processes and Using Job Control 7. Chapter 7: Using systemd to Handle Your Daemons 8. Chapter 8: Creating Shared Libraries 9. Chapter 9: Terminal I/O and Changing Terminal Behavior 10. Chapter 10: Using Different Kinds of IPC 11. Chapter 11: Using Threads in Your Programs 12. Chapter 12: Debugging Your Programs 13. Other Books You May Enjoy

Enabling and disabling a service – and starting and stopping it

In the previous recipe, we added our daemon as a service to systemd with a unit file. In this recipe, we'll learn how to enable it, start it, stop it, and disable it. There is a difference between enabling and starting and disabling and stopping a service.

Enabling a service means that it will start automatically when the system boots. Starting a service means that it will start right now, regardless of it being enabled or not. And disabling a service means that it will no longer start when the system boots. Stopping a service stops it right now, regardless of it being enabled or disabled.

Knowing how to do all of this enables you to control the system's services.

Getting ready

For this recipe to work, you'll first need to complete the previous recipe, Writing a unit file for a daemon.

How to do it...

  1. Let's start by checking out the daemon status again. It should be both...
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