Challenges

Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.

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

Challenge, Easy, on Linux, Programming

Kill a Stubborn Process with SIGKILL

by Başar Subaşı

A stubborn process is running on the system, kill it :)

#signals #sigkill #golang #kill #process

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

Challenge, Easy, on Programming, Linux

Utilize POSIX Threads for Concurrency

by Başar Subaşı

Refactor a slow, single-threaded C file downloader that fetches files sequentially into a multi-threaded program using POSIX Threads (pthreads) to achieve concurrent downloads.

#c #pthreads #threads #concurrency #gcc

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

Challenge, Easy, on Programming, Linux

Create a Process from Scratch Using Syscalls

by Başar Subaşı

Write a C program that calls fork() to clone a process and execve() to execute a command, then print and retrieve the child process PID.

#c #process #syscalls #fork #execve

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

Challenge, Easy, on Programming, Linux

Count Optimized Assembly Instructions

by Başar Subaşı

Compile a small C loop with -O2 -S, inspect the generated assembly, report how many add instructions gcc produced and see how much it has optimized the equasion.

#c #gcc #assembly #optimization

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

Challenge, Easy, on Programming, Linux

Inspect a Preprocessor Macro Expansion

by Başar Subaşı

Run gcc -E on a small C program and find the exact line where the preprocessor expanded a macro into a printf call.

#c #gcc #preprocessor #macros

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

Challenge, Easy, on Networking, Programming, Linux

Write a TCP Client for a Telemetry Server

by Ivan Velichko

Write your first TCP client for a push-only telemetry server that starts sending sensor readings as soon as you connect. Likely the easiest way to get started with TCP socket programming.

#socket #tcp

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

Challenge, Easy, on Containers, Programming

Write a Dockerfile That Excludes Dev Dependencies from the Production Image

by Ivan Velichko

Learn how to keep your container images lean by excluding development dependencies (linters, test frameworks, etc.) from the production build.

#docker #container-image #containers-101 #dockerfile #node.js

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

Challenge, Easy, on Containers, Programming

Write a Dockerfile for an Application With System-Level Dependencies

by Ivan Velichko

Practice installing OS-level packages during a Docker image build to satisfy system library requirements of your application.

#docker #container-image #containers-101 #dockerfile #python

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

Challenge, Easy, on Containers, Programming

Write Your First Dockerfile

by Ivan Velichko

Learn the absolute basics of Dockerfile authoring by containerizing a simplistic Node.js server application with just three instructions: FROM, COPY, and CMD.

#docker #container-image #containers-101 #dockerfile #node.js

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

Challenge, Easy, on Containers, Programming

Write a Dockerfile for a Simple Web Server Application

by Ivan Velichko

Learn how to write a Dockerfile from scratch and build a working container image for a web server application with a simple set of dependencies.

#docker #container-image #containers-101 #dockerfile #node.js