Learn by FixingNew scenario released! 🚀
An app was set up locally using Docker Compose... but it doesn't start.
It has 3 services: proxy, app and database.
Can you make it work?
https://www.learnbyfixing.com/scenarios/19/
Happy fixing!
New scenario released! 🚀
You tried to start a containerized app, but it doesn't run.
A colleague says it works on their laptop.
Can you make it run without changing the app's code?
https://www.learnbyfixing.com/scenarios/18/
Happy fixing!
New scenario released! 🚀
A Docker image was built to deploy an app to production… but there’s a problem.
It's over 1 GB.
Your mission: optimize its size to be under 20 MB.
Can you fix it?
https://www.learnbyfixing.com/scenarios/17/
Happy fixing!
🚀 Big Update: From Tutorials to Real Challenges.
Our labs are now real challenges, featuring:
- A "Check Solution" button to instantly validate your work.
- Optional hints if you get stuck.
- Full solution reveal when you're ready.
Less: "Follow these steps".
More: "Something is broken. Fix it."
Because that’s what real-world scenarios look like.
Ready to take on real DevOps challenges?
Instant DevOps Labs: Hands-On & Free! 🚀
Get 15 minutes of real Linux environment practice with genuine scenarios.
No signup. No email. No credit card required.
New features are here! 🚀
We’ve just launched two highly requested improvements:
- Skill-level filtering in Scenarios: find the right challenges for you.
- GitHub login support: seamless access using your GitHub account.
Ready to dive in and get hands-on? https://www.learnbyfixing.com/scenarios/
New scenario released! 🚀
Your challenge: reload the configuration of a containerized app without restarting the Docker container.
Sounds easy? Not so much when the container uses a distroless image (no shell, no debugging tools).
This scenario walks you through how to do it: https://www.learnbyfixing.com/scenarios/16/
Happy fixing!
#LearnByFixing #Linux #DevOps #SRE #Sysadmin #Docker #Containers
We have just expanded the Environment Variables guide to include their use in Docker containers:
https://www.learnbyfixing.com/guides/environment-variables/
#LearnByFixing #Linux #DevOps #SRE #Sysadmin #Docker #Containers #EnvironmentVariables
New scenario released! 🚀
You have a verbose Docker container.
Your challenge: make it log ERROR messages only without modifying the image.
In this scenario, you’ll learn how to control container behavior using environment variables.
Sharpen your Docker skills and try it now:
https://www.learnbyfixing.com/scenarios/15/
Happy fixing!
#LearnByFixing #Linux #DevOps #SRE #Sysadmin #Docker #Containers
New free guide released: System calls and strace! 🚀
Do you want to troubleshoot Linux like a pro? Our latest free guide shows you how to inspect system calls using strace, a must-have tool for every SysAdmin, SRE and DevOps engineer.
https://www.learnbyfixing.com/guides/system-calls-and-strace/
#LearnByFixing #Linux #DevOps #SRE #Sysadmin #syscalls #strace
