01
Docker Fundamentals
Understand what Docker is, why it exists, and how containers differ from virtual machines.
📘Free · 6 modules · 27 lessons
Learn Docker
A free, structured path that takes you from “what is a container?” to building and running your own images with confidence. Read a concept, then practice it live in the interactive playground — the fastest way to make Docker stick.
Your learning path
From zero to confident, in order
Follow the modules top to bottom, or jump straight to the topic you need.
02
Installation & Setup
Get Docker running on your machine — Linux, macOS or Windows.
03
Working with Images
Pull, list, tag, build and optimize the read-only templates behind every container.
04
Running Containers
Master the container lifecycle: run, inspect, log, interact with and clean up.
05
Dockerfiles
Write your own images from scratch with a Dockerfile — the recipe for reproducible builds.
06
Data & Networking
Persist data with volumes and let containers talk to each other and the outside world.
Why learn Docker?
In demand everywhere
Docker is a baseline skill for DevOps, backend, cloud and SRE roles — it appears in the vast majority of modern job descriptions.
Ends "works on my machine"
Containers bundle your app and its dependencies, so it runs identically on every machine, every time.
The gateway to Kubernetes
Containers are the foundation of Kubernetes, CI/CD pipelines and cloud-native architecture. Docker is step one.
Fast to get productive
You can learn the core workflow in an afternoon and start containerizing real apps the same day.
Frequently asked questions
Is this Docker course really free?+
Yes — every lesson and the interactive playground are 100% free, with no sign-up, no paywall and no downloads required.
Do I need programming experience to learn Docker?+
No. Basic comfort with a command line helps, but the fundamentals lessons start from zero and explain every concept along the way.
How long does it take to learn Docker?+
You can grasp the core workflow — images, containers, and the essential commands — in a few hours. Working through this full path with the playground takes roughly a weekend.
What is the best way to learn Docker?+
By doing. Read a concept, then immediately practice the command. This path pairs short lessons with a hands-on browser playground so knowledge sticks.
Do I need to install Docker to practice?+
Not to start. The interactive playground simulates Docker in your browser, so you can practice real commands before installing anything locally.
Ready to get your hands dirty?
Reading only gets you so far. Open the interactive playground and run your first real Docker commands in seconds — no install, no risk.
Launch the Docker Playground →