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

349

Solutions
attempted

107.2K

Solutions
accepted

68.4K

Difficulty

Easy Medium Hard

Reach a Whole VPC Through an SSH SOCKS Proxy

#ssh #tunnel #port-forwarding #bastion #socks

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

Challenge on Networking, Programming, Linux

Write a TCP Client for a Telemetry Server

#socket #tcp

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

Challenge on Containers, Programming

Optimize Container Images with Multi-Stage Builds

#docker #container-image #dockerfile #multi-stage

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

Challenge on Containers, Networking

Docker 101: List Docker Networks and Inspect the Default Bridge

#docker #container-networking #investigation

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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

How To Extract Container Image Filesystem Using Docker

by Ivan Velichko

How to explore the filesystem of a container image using nothing but the standard Docker means (and without running any containers).

How To Extract Container Image Filesystem Using Docker (cover image)

#container-image #docker #containerd

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

Tutorial on Linux

Controlling Process Resources with Linux Control Groups

by Ivan Velichko

Learn how to limit process resources using Linux cgroups - from the most basic and labour-intensive cgroupfs manipulation to the handiest systemd-run command.

Controlling Process Resources with Linux Control Groups (cover image)

#cgroups #libcgroup #systemd

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