Linux quiz

Test your Linux knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What does the pipe `|` do in the shell?

1. What does the pipe `|` do in the shell?
2. What does `cmd > out.txt 2>&1` do?
3. What is `cron` used for?
4. `sudo` is best described as:
5. Linux file permissions are commonly represented as three triples (e.g. `rwxr-xr--`). What do the triples correspond to?
6. `top` and `htop` are best described as:
7. Which command prints the current working directory?
8. How do you run a command in the background and return to the prompt?
9. Which command finds files matching a name or property in a directory tree?
10. The basic SSH command to log into a remote host as user `alice`:
11. A Linux "distribution" differs from the kernel in that:
12. `systemd` is most commonly used in modern Linux distributions to:

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