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.
Challenges crafted by iximiuz Labs to help you master DevOps and Server Side topics.
A newly provisioned server is reachable as root with a shared seed password. Create a sudoer admin user, switch SSH to key-based access, disable password and root logins, and retire the seed credential.
An inventory service lives inside a private VPC and keeps its debugging port bound to 127.0.0.1. Use SSH local port forwarding with a jump-only bastion to query the debugging port from your workstation.
The application fleet lives inside a private VPC, reachable only through a locked-down bastion that refuses to give you a shell. Find a way to jump through the bastion and place a maintenance lock on two misbehaving servers.
Harden a bastion host so only admins can get a shell on it, operators can open tunnels to arbitrary destinations, and developers can reach only the one internal service they actually need.
Challenges from outstanding independent authors proudly hosted by iximiuz Labs.
Did you know that pods can become invisible? Can you figure out how?
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.
Get hands-on with reading secrets from different providers and using them in your Dagger pipelines.
Challenges contributed by the community members sharing their knowledge and expertise.
A deployment is running without health probes or graceful shutdown configuration. Add startup, liveness, and readiness probes plus a preStop hook and terminationGracePeriodSeconds to make it ready for real traffic.
Build a StatefulSet with a headless Service, watch ordered Pod creation, verify per-replica PVC naming, scale down and back up, prove stable identity, then roll an image update and roll back using ControllerRevision history.
The cluster is broken again. Get the Klustered deployment healthy and serving a quote, then ship the v2 image to unlock the victory dance.
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/.
