Pass DevOps Interviews by Fixing Real Linux Servers
Debug Docker containers, misconfigured services, and crashing systems. No simulations. No quizzes.
Start your first free lab now.
Over 1500 labs completed by engineers.
Built for Engineers Who Want Real Debugging Skills
If you want hands-on experience fixing real systems, not just watching tutorials, this is for you:
- Preparing for DevOps or SRE interviews? Practice the same types of broken systems and debugging problems used in real interviews.
- Moving into a DevOps or SRE role? Build the practical skills you'll actually use on the job.
- Tired of guessing when debugging production issues? Learn a clear and systematic approach to diagnosing and resolving problems more efficiently.
Start Debugging in 3 Simple Steps
No setup. Just pick a scenario and get started.
Solve the challenge
Use the terminal to debug broken services and misconfigurations. Get hints if you get stuck.
Check your solution
Verify your fix instantly and see how a senior engineer would solve it.
Why Engineers Choose This Over Courses
No videos. No tutorials. Just real debugging.
Real Linux servers
Build real troubleshooting skills by working on broken production-like systems, not simulations.
Instant feedback loop
Test your fix and instantly see the result.
Get unstuck without spoilers
Get guided hints that help you think like a senior engineer.
See expert solutions
Compare your approach with a senior engineer's step-by-step fix and learn how experts actually think.
What engineers are saying
Learn by fixing is a great learning companion. I totally recommend it to anyone who is either trying to brush up on their basics, preparing for an interview, or just starting.
Esther Ninyo
Site Reliability Engineer
Learn by Fixing is really awesome! I was very happy to learn about syscalls and strace in such a short time.
Joanna Sommer
Software Engineer
An excellent platform to level up your Linux skills. As a QA, it's given me a deeper understanding of testing applications on Linux. I really like it!
David Vázquez
QA Engineer
Start free. Upgrade anytime for $8/month.
Your Path to Mastering Real-World Debugging
Not sure what to learn next? Follow a structured path from basic debugging to real production troubleshooting. No guessing, just progression.
- Guides: Learn the core concepts you need to debug confidently.
- Skill Paths: Build targeted skills with curated scenarios, one topic at a time.
- Roadmaps: Follow a complete journey from beginner to expert in a specific domain.
Frequently Asked Questions
Do I need previous experience to start?
No, you only need basic Linux knowledge to use the terminal. The scenarios are designed to help you grow from fundamentals to real-world troubleshooting, step by step.
Will this help me prepare for DevOps and SRE interviews?
Yes, these are the same types of broken systems and debugging problems used in DevOps and SRE interviews. You'll learn how to approach them systematically, just like in real interviews.
How long does each scenario take?
Most scenarios take 5 to 30 minutes, depending on the difficulty. They're designed to give you focused, hands-on practice without wasting your time.
How often are new scenarios released?
New scenarios are added at least weekly, so you always have fresh debugging challenges to practice.
What happens after I've completed the free scenarios?
The Pro plan unlocks all scenarios and unlimited labs so you can continuously improve your debugging skills.
Can I get a refund?
Yes, we offer a 14-day refund guarantee so you can try it risk-free.
Start Fixing Real Linux Servers
Engineers are debugging real production issues right now. Join them.
Start your first free lab now.