Master Server-Side Technologies
by Doing

A hands-on learning platform for Linux, Docker, Kubernetes, and Networking

Practice on real servers, solve challenges, and follow guided Linux, Docker, Kubernetes, and Networking learning paths — all from your browser or via SSH.

labctl playground start docker

Spinning up a fresh Docker host... Ready!

root@vm:~$

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Featured Roadmap

Master Docker
from Zero to Hero

Follow a comprehensive roadmap that combines practical challenges with focused theory and vibrant diagrams. Start with the basics, work through must-have topics, and go deeper when you're ready.

Structured progression from basics to advanced
Hands-on challenges with automated checking
Theory, diagrams, and practical exercises combined

Explore the Docker Roadmap

Hands-on Challenges

Prepare for Interviews.
Build Real Skills.

Solve focused, bite-sized problems to gain practical Linux, Docker, Kubernetes, and Networking skills — from easy warm-ups to hard troubleshooting-style scenarios.

Realistic server environments
Automated step-by-step checks
Hints when you're stuck
Editorial solutions included

Challenges
to solve

341

Solutions
attempted

105.8K

Solutions
accepted

67.4K

Difficulty

Easy Medium Hard

Edit a File in a Running Kubernetes Pod: a Tricky Case

#troubleshooting #slim-image #distroless #kubectl

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Linux

Start a systemd Service on the First Connection (Unix Socket Edition)

#systemd #socket #unix-socket

This challenge was prepared for you by the iximiuz Labs team.

Challenge on CI/CD

Install the Dagger CLI on a Linux Host

#dagger #docker

This challenge was prepared for you by the iximiuz Labs team.

Challenge on Containers, Kubernetes

Copy Files To/From a Running Kubernetes Pod: a Simple Case

#kubernetes-101 #kubectl #troubleshooting

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Tutorials & Courses

Dive into Linux, Networking,
Docker and Kubernetes

Deep, illustrated articles with reproducible steps, or structured courses with guided exercises and practical assignments. Every tutorial and lesson comes with an attached playground — try commands right in your browser, no extra setup required.

Interactive content with embedded playgrounds
Run commands directly in web terminals or via SSH
Courses with step-by-step guided exercises

Interactive tutorial with embedded terminal

This tutorial was prepared for you by the iximiuz Labs team.

Tutorial on Containers, Linux

Building Container Images FROM Scratch: 6 Pitfalls That Are Often Overlooked

by Ivan Velichko

While "FROM scratch" containers may seem functional, they often lack essential components that programs expect to find in their execution environment. Discover the most common pitfalls of building container images "FROM scratch" and learn how to avoid them.

Building Container Images FROM Scratch: 6 Pitfalls That Are Often Overlooked (cover image)

#container-image #slim-image #distroless

This tutorial was carefully crafted by an independent author and proudly hosted by iximiuz Labs.

Tutorial on Security

An Introduction to Docker Security

by Rory McCune

In this tutorial, we'll dive into the world of Docker Security, look at the attack surface of a Docker installation and show some straightforward container breakouts

#docker

This course was prepared for you by the iximiuz Labs team.

Course on CI/CD, Containers

An Alternative Introduction to Dagger: Understanding the Core Concepts

by Ivan Velichko

Build a mental model of how Dagger works by migrating an example software project from traditional script-based automation to a Dagger-powered development workflow, peeking under the hood of the new technology on the way.

An Alternative Introduction to Dagger: Understanding the Core Concepts (cover image)

#dagger #devops #ci-pipeline

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Playgrounds

Experiment Freely
in Safe Sandboxes

Spin up vanilla Linux VMs, fresh Docker hosts, or Kubernetes clusters in seconds. Access playgrounds via browser terminal or SSH and experiment without fear of breaking anything.

Provisioned in seconds, not minutes
Browser terminal and SSH access
Multi-VM setups with custom configurations
Preserve your progress with persistent drives