Execute Host Commands Inside a Running Container
Leverage your knowledge of Linux namespaces to reach an application's internal debug interface without installing anything into the container.
Submissions: 362/829
Challenges
Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
Official Collection
Challenges crafted by iximiuz Labs to help you master DevOps and Server Side topics.
Run a Sidecar Container in the Namespace of Another Container
Learn how to run multiple Docker containers sharing the same PID, IPC, and network namespaces - a foundation of many advanced container use cases, including Kubernetes Pods construction and container debugging tools.
Submissions: 163/324
Challenge, Medium, on
Docker 101: Create, Start, Pause, Unpause, Stop, Restart, Kill, and Remove a Container
Explore the key container management operations by walking through all the phases of the container lifecycle - from creation to termination and removal.
Submissions: 236/488
Challenge, Easy, on
Docker 101: Pause and Unpause a Containerized Application
Practice pausing and resuming a running container: start a resource-hungry container, pause it, inspect its state, and then unpause it back to life.
Submissions: 303/580
Independent Authors
Challenges from outstanding independent authors proudly hosted by iximiuz Labs.
Challenge, Hard, on
Kube Mysteries: The Invisible Pod
Did you know that pods can become invisible? Can you figure out how?
eBPF Challenge for Beginners
In this challenge, you’ll debug and fix a deliberately “broken” eBPF program, then prove it’s running by identifying its program and map IDs. Along the way, you’ll explore bpftool, check which helpers are supported, and dig into details like the UID of the loader. Finally, you’ll test your knowledge of eBPF maps by recalling the flag that only inserts a key if it doesn’t already exist.
Submissions: 55/174
Dagger: Working with Secrets
Get hands-on with reading secrets from different providers and using them in your Dagger pipelines.
Submissions: 3/21
Challenge, Easy, on
Dagger: Module Dependencies
Learn how to install, update and uninstall Dagger module dependencies.
Submissions: 3/6
Community Collection
Challenges contributed by the community members sharing their knowledge and expertise.
Challenge, Easy, on
Set and Use Secrets in a Kubernetes Deployment
by Omkar Shelke
Configure a Kubernetes Deployment to consume Secrets as environment variables and volume mounts.
Submissions: 4/5
Challenge, Easy, on
The SED command : Survival Guide - What You Must Know
Master **sed**, the essential stream editor for Linux SysAdmins. Progress through 10 tasks: simple & global substitution, regex patterns, line ranges, deletion, insertion, ... Work with realistic Rocky Linux system files in /home/laborant/sed_challenge/.
Submissions: 19/31
Challenge, Easy, on
Kubernetes Pod Lifecycle Fundamentals
by Adithya G
Practice the fundamental lifecycle of a Kubernetes Pod: creation, inspection (IP, node), interaction (executing commands, checking logs), and deletion.
Submissions: 53/197
Challenge, Easy, on
CKA Practice: Upgrade Multi-Node Kubernetes Cluster
by Adam Leskis
This exercise tests your ability to safely upgrade a multi-node Kubernetes cluster from version 1.30 to 1.31 following the standard upgrade procedure.
Submissions: 30/107