Linux Quiz — Test Your Command Line & OS Knowledge
Linux is the operating system of the cloud. Bash scripting, process management, file permissions, networking tools, and system monitoring are table-stakes skills for any backend, DevOps, or SRE role.
Linux knowledge is assumed in virtually every backend and infrastructure job. A verified score demonstrates you can navigate a production server, write reliable shell scripts, debug running processes, and understand the OS primitives that containers and cloud instances are built on.
Sample Questions
3 of 10Q1.What does the command `chmod 755 script.sh` do?
Q2.What is the purpose of `systemd` in modern Linux distributions?
Q3.What does `grep -r 'ERROR' /var/log/ 2>/dev/null` do?
Answer all 3 questions to see your score
Get your verified Linux score
Take the full 10-question quiz. Your score gets added to your developer resume as a verified skill badge — proof that you actually know Linux.
How verified skills work
Take the Linux quiz
10 adaptive questions covering real-world scenarios, not just syntax recall.
Your score is recorded
Skeelzy tracks your accuracy per skill over time — multiple attempts improve your verified score.
Add it to your resume
Your Linux accuracy appears as a verified badge on your public Skeelzy resume — proof for recruiters.