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The Linux DevOps Handbook

You're reading from   The Linux DevOps Handbook Customize and scale your Linux distributions to accelerate your DevOps workflow

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Product type Paperback
Published in Nov 2023
Publisher Packt
ISBN-13 9781803245669
Length 428 pages
Edition 1st Edition
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Authors (2):
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Damian Wojsław Damian Wojsław
Author Profile Icon Damian Wojsław
Damian Wojsław
Grzegorz Adamowicz Grzegorz Adamowicz
Author Profile Icon Grzegorz Adamowicz
Grzegorz Adamowicz
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Toc

Table of Contents (20) Chapters Close

Preface 1. Part 1: Linux Basics
2. Chapter 1: Choosing the Right Linux Distribution FREE CHAPTER 3. Chapter 2: Command-Line Basics 4. Chapter 3: Intermediate Linux 5. Chapter 4: Automating with Shell Scripts 6. Part 2: Your Day-to-Day DevOps Tools
7. Chapter 5: Managing Services in Linux 8. Chapter 6: Networking in Linux 9. Chapter 7: Git, Your Doorway to DevOps 10. Chapter 8: Docker Basics 11. Chapter 9: A Deep Dive into Docker 12. Part 3: DevOps Cloud Toolkit
13. Chapter 10: Monitoring, Tracing, and Distributed Logging 14. Chapter 11: Using Ansible for Configuration as Code 15. Chapter 12: Leveraging Infrastructure as Code 16. Chapter 13: CI/CD with Terraform, GitHub, and Atlantis 17. Chapter 14: Avoiding Pitfalls in DevOps 18. Index 19. Other Books You May Enjoy

Virtualization versus containerization

In this section, we are going to explain what virtualization and containerization are and what the major differences between them are.

Virtualization

Virtualization is a technique of running a complete simulated computer within another computer. Complete means that it mirrors everything a physical computer would have: motherboard, BIOS, processor, hard drives, USB ports, and so on. Simulated means that it is entirely a product of software. This computer does not exist physically, thus it is called virtual. To exist, the virtual machine (VM), as simulated computers are often called, needs a real, physical one to emulate it. The physical machine is called a host or hypervisor.

So, I have a physical computer. It is powerful. Why would I want to run a VM in it? For obvious reasons, the VM will be less powerful than the host: after all, the host requires RAM, CPU, and hard drive space for itself. There is also some small drop in performance...

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