Continue your lesson
Connect the command you run to the file, process, service, permission, or kernel state it changes.
Block 1 of 1Compare top · free · iostat · journalctl
Current · 12 min
Compare top · free · iostat · journalctl
Optional concept notes
top
Shows live process CPU memory and system load information.
free
Summarizes physical memory swap use and available memory.
iostat
Reports processor use and block-device input or output statistics.
journalctl
Filters service and system logs during operational investigation.
Complete one provider lesson, then answer four related questions. That is enough for today; more practice is optional.
Your lesson stays open here while the provider opens in another tab. Choose one source; the notes above are optional.
Practice the reasoning here
Use a disposable Linux system. Predict a command's effect, run it, inspect exit status and logs, then restore the starting state.
- State the expected result before changing or testing anything.
- Name the observation, command, log, or report that would confirm it.
- Explain why the closest alternative does not fit the same requirement.
Check the whole objective
This unlocks objective 5.1 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.