Challenge, Easy, on
Pause and Resume Linux Processes with cgroup Freezer
Practice pausing (freeze) and resuming (thaw) a resource-hungry Linux process using the cgroup v2 freezer mechanism.
Submissions: 190/485
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.
Docker 101: Signal a Running Containerized Application
Practice using UNIX signals with containers for controlling application behavior: Send a SIGUSR1 to a containerized app to trigger its memory usage reporting.
Submissions: 338/542
Challenge, Easy, on
Mount an Existing Directory at a New Location (bind mount)
Practice mapping existing directories to new paths using Linux bind mounts and see the core tech behind container volumes in action.
Submissions: 222/327
Docker 101: Pass Environment Variables to Containers
Discover why host environment variables aren't visible to containers and how to properly pass them to containerized applications in Docker.
Submissions: 419/496
Independent Authors
Challenges from outstanding independent authors proudly hosted by iximiuz Labs.
eBPF Challenge for Beginners
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.
Submissions: 55/174
Community Collection
Challenges contributed by the community members sharing their knowledge and expertise.
Challenge, Easy, on
The SED command : Survival Guide - What You Must Know
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/.
Submissions: 21/33