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.
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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.
Leverage your knowledge of Linux namespaces to reach an application's internal debug interface without installing anything into the 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.
Learn how to execute commands inside running containers using 'docker exec' - a crucial skill for debugging containerized applications and exploring container environments.
Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?
Can you unpack the filesystem of a container image into a local directory?
Can you edit a file in a running container? What if there is no shell?
Learn on practice the limitations of FROM scratch images and the ways to mitigate them.
Be a networking Sherlock Holmes - find out which port a Kubernetes app uses and send a request to it.
Learn how to send a signal to a Kubernetes app running in a container without shell.
Learn a bunch of Linux networking tricks while trying to access an Nginx server running inside a Docker container with no published ports.