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:~$

Start for Free

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

180

Solutions attempted

54.2K

Solutions accepted

31.3K

Difficulty

Easy Medium Hard

Docker 101: Run a Container in Background, Read Logs, and Attach

docker containers-101 container-runtime

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

Challenge, Hard, on Kubernetes, Containers, Linux

Make a Kubernetes Pod Survive an OOM Event Without Restarting

pod-resources cgroups oom

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

Challenge, Hard, on Linux, Containers, Networking

Network Access to a Container Started by ctr

containerd ctr docker

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

Challenge, Hard, on Linux, Containers, Networking

Connect Multiple Network Namespaces

container-networking netns veth bridge ip

Browse All Challenges

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

Tutorial on Security

Getting Started with OpenBao/Vault

by Márk Sági-Kazár

Learn how to get started with OpenBao/Vault by walking through the basics of initialization, unsealing, authentication, and secret management.

Getting Started with OpenBao/Vault (cover image)

openbao vault secret-management

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

Course on Kubernetes

Kubernetes the (Very) Hard Way

by Márk Sági-Kazár

A hands-on, step-by-step guide to assembling a Kubernetes cluster from the ground up, (without using any automation) while deeply exploring each component's role and functionality along the way.

Kubernetes the (Very) Hard Way (cover image)

Browse Tutorials Browse Courses

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