Requesting poweroff through systemd | LinuC Level 1 101 Exam original practice question

1.01.3Basic

Stop the system cleanly and request poweroff from supported hardware.

Which command is appropriate?

Hint 1: Focus on the requirement

Distinguish a final power state from a reboot or a suspend operation.

Hint 2: Key terms

Review the short definitions before comparing the boot and systemd choices.

systemctl poweroff: A systemctl action that requests an orderly shutdown followed by power-off.
Power state: The platform state such as running, suspended, halted, or powered off.
Graceful shutdown: An orderly stop that lets services flush state and release resources.
Filesystem sync: Writing pending filesystem data before the system is stopped.

Detailed explanation

Incorrectsystemctl reboot

Incorrect. reboot starts the system again.

Correctsystemctl poweroff

Correct. systemctl poweroff requests a managed poweroff.

Incorrectsystemctl suspend --off

Incorrect. suspend is a sleep state, not a poweroff command with this option.

Incorrectsystemctl kill power.target

Incorrect. systemctl kill sends signals and is not the normal poweroff workflow.

An example you can run in a temporary verification environment.

systemctl poweroff --help 2>/dev/null | head || true

poweroffのhelp。電源操作は行わない

Environment: systemctl helpのみ
Use read-only commands or a disposable Linux instance when checking boot metadata.
Exact unit names and command output can vary slightly by distribution.

Foundation review

poweroff requests final power-off; reboot restarts the system and suspend enters a low-power state.

Confirm that remote access and unsaved work are accounted for before a power transition.

Question IDKL-101-348

Environmentsystemctl helpのみ

Last technical review2026-08-13

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