Most study systems treat every fact the same. This one doesn't — recite the list, run the exercise, or explain the concept, depending on what you actually need to retain. Reviews land on a schedule that stretches as you prove you know it.
A list of runlevels and a grep one-liner don't test the same skill. Each topic is tagged with how it should be reviewed.
For enumerable things — directories, targets, flags. You reconstruct the whole list, not just recognize it.
For commands and syntax. You write working output, not describe what a flag does.
For concepts. If you can't explain chmod 754 in your own words, you don't know it yet.
Pass a review and the next one moves further away. Miss one and it resets to stage zero — no penalty beyond that.
Log in to see what's due, or import a new batch of topics as JSON.
Open today's review