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: 413/902
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: 205/381
Free Up Disk Space by Removing Unused Docker Volumes
Your Docker host has been in use for a while. Anonymous and named volumes piled up, disk space is tight, and it's time to clean stuff up.
Submissions: 156/405
Ensure a Graceful Termination for a Container With an Entrypoint Script
Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?
Submissions: 72/156
Limit CPU and Memory Usage of a Docker Compose Application
Run a multi-container Docker Compose application limiting its total CPU and memory usage without specifying the individual container's limits.
Submissions: 120/215
Make the Container Exit When One of Its Processes Runs Out of Memory
Learn how to fine-tune the container's cgroup to make the container exit when one of its processes runs out of memory.
Access a Docker Container With No Published Ports
Learn a bunch of Linux networking tricks while trying to access an Nginx server running inside a Docker container with no published ports.