Challenges | iximiuz Labs

Find challenges matching your interests...

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.

Make a Container Restart Automatically After Docker Host Reboot

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 Linux, Networking

Protect an Unintentionally Exposed Server Port with Firewall Rules

by Ivan Velichko

An HTTP service is running on the server, but it's exposed to the entire network. Use Linux firewall tools to block external access to the service port while keeping it accessible locally.

firewall iptables nftables ufw firewalld

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

Challenge, Medium, on Containers, Linux

Execute Host Commands Inside a Running Container

by Ivan Velichko

Leverage your knowledge of Linux namespaces to reach an application's internal debug interface without installing anything into the container.

docker debugging distroless nsenter

See all official challenges →

Community Collection

Challenges contributed by the community members sharing their knowledge and expertise.

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Troubleshoot a Website That Is Not Accessible

by Omkar Shelke

A web application is deployed but the website is not accessible. Investigate and fix the issue.

ckad cka troubleshooting service debugging

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Linux, Observability

AWK Mastery: From Zero to Hero

by Lotfi Hamadene

3-phase AWK challenge on realistic data in /home/laborant/awk_challenge/. Fundamentals: columns, delimiters, formatting. Logic & regex: filters, anchors, conditions, math. Sysadmin: logs, CSVs, metrics, counts, reports. Data lives under /home/laborant/awk_challenge/ (logs/access, data/hr, sys/metrics) and outputs are written to /home/laborant/ files.

awk scripting text-processing rhcsa

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Place One Pod per Node Without Using a DaemonSet

by Omkar Shelke

Deploy a multi-container Kubernetes Deployment and ensure that no more than one Pod runs on the same worker node, without using a DaemonSet.

scheduling deployment cka multi-container

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Containers

Hardening Docker Containers Using gVisor Runtime

by Omkar Shelke

Configure Docker to use gVisor (runsc) as the default runtime and verify kernel isolation between the host and containers.

docker container-runtime gvisor containerd

See all challenges from the community →