DevOps for Beginners
by Sergey Okinchuk
Ch. 1

DevOps for Beginners

Welcome

DevOps is how modern teams build software and keep it running — not a single tool and not a job title, but a way of working. This course builds that whole picture from the ground up: why the people who write code and the people who run it became one team, what every practice and tool along the way is actually for, and how it all clicks into one feedback loop. Concept-first, with no command line and nothing left undefined.

12 chapters 38 topics covered 4 hours audio Knowledge check on every topic

About This Course

You have probably heard the word "DevOps" attached to job posts, teams, and tools, and come away unsure what it actually names. That is not your fault — the word gets used for a culture, a set of practices, and a pile of software all at once. This course untangles it, in plain language, from nothing.

To keep it grounded, the whole book follows one small team shipping one small app. Maya writes the code; Sam keeps it running; the app is Pageturn, a simple website where people log the books they have read. You will watch a single change to Pageturn travel from Maya's keyboard all the way out to real readers, and meet every practice and tool that makes that journey fast, safe, and repeatable.

By the end, the terms that fill every other technical course — version control, continuous integration, containers, infrastructure as code, deployment, monitoring — will already mean something to you, and you will see how they fit together rather than as a list of buzzwords. There is no command line here and nothing to install. A few short, real snippets of configuration appear along the way, but only to look at; you never write them. When it is time to actually build these things, each chapter points you to the deep-dive course where you will.

Who This Is For

Anyone who wants to understand how software is really built and run today — people switching into tech, students, new engineers, and anyone working alongside a DevOps or platform team who wants to follow the conversation. It assumes you already know roughly what a server, code, and "the cloud" are (the Computing Foundations from Zero course covers exactly that, if those words are still fuzzy). It does not assume you have ever used Git, Docker, or a cloud console. If you are already shipping pipelines for a living, this course is below you — head straight for one of the deep dives.

What You Should Already Know

  • Roughly what a server, code, and a database are — the everyday picture, not the details
  • What it means, loosely, that an app "runs on a computer somewhere" and you reach it over the internet
  • A willingness to meet new words; each one is explained the first time it appears
  • No programming, no command line, and no experience with any specific tool required

How the Course Is Built

The twelve chapters come in three parts. Part one is the why — the two jobs of building and running software, the wall that used to stand between them, what DevOps actually is, and the feedback loop at its heart. Part two walks the toolchain in the order a change travels: version control, continuous integration, containers, orchestration, infrastructure as code, and safe deployment. Part three keeps it running and zooms out: monitoring, security along the way, the cloud, and a final chapter that follows one change through the entire loop and points you to what comes next.

Every topic has the same gentle shape: an everyday hook to start, the idea explained step by step, one real-world comparison to make it stick, the mix-ups people usually run into, why it matters in practice, and a short knowledge check at the end. It is patient, but it keeps moving — you are here to learn, not to be slowed down.

Culture first, tools second
DevOps is a way of working before it is any piece of software. We lead with the why — shared ownership, fast feedback, "you build it, you run it" — and let the tools earn their place as ways to live it out.
One team, one app
Maya, Sam, and the Pageturn app run through every chapter. Each new idea attaches to the same story, so the picture accumulates instead of resetting page to page.
See it, don't type it
A handful of real, tiny snippets — a build file, a container recipe — appear so the artifacts stop being abstract. You only ever read them; the hands-on work waits for the deep-dive courses.
A map, not a maze
Every strand hands off to the deep course where you will actually practice it — Git, Docker, Kubernetes, Terraform, Ansible, the cloud. This course is the map that makes those make sense.

Chapter Map

Chapter 1
The Problem DevOps Solves
The two jobs of building and running software, the wall that used to stand between the people who do each, what DevOps actually is, and the feedback loop at the center of it all.
Chapter 2
Automation
The single most repeated move in DevOps: doing a task once by writing it down for a machine, what a pipeline is, and why automation is worth the effort it takes to set up.
Chapter 3
Version Control
How a team works on one shared codebase without overwriting each other: commits and history, branches and merging, and the pull request where changes get reviewed.
Chapter 4
Continuous Integration
Why combining everyone's changes used to be agony, how doing it continuously and checking each change automatically fixes that, and the automated tests that make it safe.
Chapter 5
Containers
The "works on my machine" problem, what a container is and how it carries an app's whole environment with it, and the difference between an image and a container.
Chapter 6
Orchestration
Why running many copies of an app across many servers needs a manager, what an orchestrator does, and how it updates a live app without taking it offline.
Chapter 7
Infrastructure as Code
Replacing the clicking-in-a-console with a file that describes what you want: creating servers from code, and making them ready to run your app.
Chapter 8
Delivery & Deployment
The real difference between delivery and deployment, the dev / staging / production environments a change moves through, and how to release safely with canaries and rollbacks.
Chapter 9
Monitoring & Observability
Why going live is the start of the job, not the end: logs, metrics, and alerts in plain terms, and what being on-call and handling an incident really mean.
Chapter 10
Security Along the Way
Why security can't be bolted on at the end, why passwords and keys never go in the code, and how scanning catches known problems early in the pipeline.
Chapter 11
The Cloud and DevOps
Why the cloud and DevOps grew up together, how whole environments appear from a file and vanish when you're done, and what a managed service really is.
Chapter 12
Putting It All Together
One change to Pageturn followed from keyboard to live users through every stage, why the tools serve the culture and not the reverse, and where to go next.

Disclaimer

This course is an independent educational project created and maintained by Sergey Okinchuk. It is provided for learning and reference purposes only.

No affiliation. This course is not affiliated with, sponsored by, endorsed by, or officially connected to GitHub, Microsoft, Docker, the Cloud Native Computing Foundation, the Linux Foundation, HashiCorp, Red Hat, Amazon, Google, or any other company or project mentioned. All opinions, interpretations, and recommendations expressed are those of the author.

Trademarks. "GitHub" and "GitHub Actions" are trademarks of GitHub, Inc. "Docker" is a trademark of Docker, Inc. "Kubernetes" is a trademark of The Linux Foundation. "Terraform" is a trademark of HashiCorp, Inc. "Ansible" is a trademark of Red Hat, Inc. "AWS" is a trademark of Amazon.com, Inc. or its affiliates. "Google Cloud" is a trademark of Google LLC. "Azure" is a trademark of Microsoft Corporation. Other product names are trademarks of their respective owners. Use of these names and marks is for identification and educational purposes only and does not imply any endorsement.

Accuracy and currency. Technology evolves continuously — products, interfaces, and details drift over time. Facts in this course reflect the author's understanding at the time of writing and may not be current. This course teaches durable concepts rather than step-by-step instructions for any specific product; always consult official documentation as the authoritative source before making operational decisions.

No warranty. This material is provided "as is" without warranty of any kind. Explanations are simplified for learning and are not a substitute for professional or security advice. The author accepts no liability for any loss or damage arising from reliance on the content.