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

304

Solutions attempted

91.7K

Solutions accepted

57.1K

Difficulty

Easy Medium Hard

Inspect a Container Image Without Pulling It

#container-image #oci-image #docker #container-registry

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

Challenge, Easy, on Linux

Run an ARM64 Binary on an AMD64 Machine Using QEMU Emulation

#emulation #qemu #multi-platform

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

Challenge, Easy, on Linux

Pause and Resume Linux Processes with cgroup Freezer

#cgroups

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

Challenge, Easy, on Containers

Docker 101: Pull Container Images from Different Registries

#container-image #docker #container-registry #containers-101

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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, Networking, Linux

How Container Networking Works: Building a Bridge Network From Scratch

by Ivan Velichko

Begin with the basics to understand Docker and Kubernetes networking: learn how to create and interconnect Linux network namespaces using only command-line tools.

How Container Networking Works: Building a Bridge Network From Scratch (cover image)

#container-networking #netns #bridge

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

Tutorial on Linux, Programming

Different Ways To Deliver Kernel Events from eBPF to User Space

by Teodor Janez Podobnik

In this tutorial, you’ll learn how eBPF applications send kernel events into user space using perf buffer and ring buffer, exploring their design, trade-offs, and performance implications. You’ll also learn how moderns solutions like Jibril handle high-throughput event delivery.

#eBPF

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

Course on Security, Kubernetes

Software Bill of Behavior - vendor supplied runtime profile for tampering and anomaly detection

by Constanze Roedig

We ♥️ supply chain security, thus was created SBOM - the Bill of Materials- but, we also need SBOB -the Bill of Behavior - This livelab proposes to standardize how to record a benign behavior profile, extract, sign and publish it, for users to consume, ingest, verify it and detect attacks and tampering. For software-vendors, a SBOB creates trust and transparency, For users, it makes anomaly detection realistically achievable.

#supplychain #anomaly #behaviour

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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