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

347

Solutions
attempted

107.1K

Solutions
accepted

68.4K

Difficulty

Easy Medium Hard

Protect an Unintentionally Exposed Server Port with Firewall Rules

#firewall #iptables #nftables #ufw #firewalld

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

Challenge on Linux, Networking

Classic Sysadmin Task: Which Port Is a Service Listening On?

#investigation #socket #tcp #os-process

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

Challenge on Kubernetes, Containers

Deploy a Pod with a Container Image from a Private Registry

#kubernetes-101 #container-registry #container-image #kubectl

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

Challenge on Kubernetes

Kube Mysteries: The Invisible Pod

#kubelet #pod

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

Tutorial on Programming, Linux

From Zero to Your First eBPF Program

by Teodor Janez Podobnik

In this first tutorial, you’ll run a pre-coded eBPF program and see it in action without writing any code yourself. We’ll walk through the important parts of the program so you understand how eBPF hooks and runs in the kernel. The goal is to get familiar with the workflow and core concepts before you start writing your own eBPF programs.

#eBPF

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

Tutorial on Kubernetes, Containers

Docker Containers vs. Kubernetes Pods - Taking a Deeper Look

by Ivan Velichko

Can a Kubernetes Pod be created with plain Docker commands? Learn the difference between Containers and Pods by exploring how they are implemented under the hood.

Docker Containers vs. Kubernetes Pods - Taking a Deeper Look (cover image)

#linux-namespaces #cgroups #pod

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