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.

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Official Collection

Challenges crafted by iximiuz Labs to help you master DevOps and Server Side topics.

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

Challenge, Medium, on Containers

Make a Container Restart Automatically After Docker Host Reboot

by Ivan Velichko

Learn how to configure a Docker host and its containers to automatically restart when the server reboots or the Docker daemon restarts.

docker containers-101 container-runtime

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

Challenge, Medium, on Containers

Make a Container Restart Automatically After Podman Host Reboot

by Ivan Velichko

Unlike Docker, Podman is daemonless and requires some extra systemd help to monitor and restart containers. Learn how to configure a Podman host and its containers to automatically restart after a server reboot.

podman containers-101 container-runtime

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

Challenge, Medium, on Containers, Linux

Run a Sidecar Container in the Namespace of Another Container

by Ivan Velichko

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.

docker container-runtime namespaces debugging

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

Challenge, Medium, on Containers

Docker 101: Create, Start, Pause, Unpause, Stop, Restart, Kill, and Remove a Container

by Ivan Velichko

Explore the key container management operations by walking through all the phases of the container lifecycle - from creation to termination and removal.

docker containers-101 container-runtime container-rootfs

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

Challenge, Medium, on Containers

Docker 101: Stop and Restart a Containerized Application Preserving Its Data

by Ivan Velichko

Learn the difference between stopping and permanently removing containers while operating a personal finance tracker application.

docker containers-101 container-runtime filesystem container-rootfs

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

Challenge, Medium, on Containers

Docker 101: Execute Commands in a Running Container

by Ivan Velichko

Learn how to execute commands inside running containers using 'docker exec' - a crucial skill for debugging containerized applications and exploring container environments.

docker containers-101 container-runtime debugging

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

Challenge, Medium, on Containers

Docker 101: Override Container Entrypoint to Run an Interactive Shell

by Ivan Velichko

Learn how to override a container's default entrypoint to run an interactive shell instead of the intended application, a useful technique for debugging and exploring containerized applications.

docker containers-101 container-runtime entrypoint

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

Challenge, Medium, on Containers

Start and Inspect a Container With containerd CLI - ctr

by Ivan Velichko

Can you start a container using the default containerd CLI, ctr? Knowing how to use ctr may come in handy when you need to debug lower-level container issues.

ctr containerd container-runtime containers-101