Enabling and starting a timer | LPIC-1 102-500 Exam original practice question

107.2Standard

Start backup.timer now and make it start automatically on future boots.

Which command is appropriate?

Hint 1: Focus on scheduling scope

Separate recurring and one-time jobs, access-control files, and execution context before comparing the choices.

Hint 2: Key terms

Review the short definitions of recurring jobs, one-time jobs, and scheduling controls.

enable: An operation that creates persistent boot-time activation for a unit.
--now: A modifier that starts or stops the unit immediately while enabling or disabling it.
start: An operation that changes the unit's current state without creating persistent enablement.
daemon-reload: An operation that makes systemd reread changed unit definitions.

Detailed explanation

Incorrectsystemctl start backup.service

Incorrect. It starts a service once and does not enable the timer.

Incorrectsystemctl enable backup.timer

Incorrect. It enables the timer for boot but does not start it now.

Correctsystemctl enable --now backup.timer

Correct. It enables and starts backup.timer.

Incorrectsystemctl daemon-reload backup.timer

Incorrect. daemon-reload reloads definitions but does not enable or start a unit.

An example you can run in a temporary verification environment.

printf '%s\n' 'enable: persistent boot activation' 'now: start immediately'

enable: persistent boot activation
now: start immediately

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKP-107-703

Environment状態変更しない意味確認

Last technical review2026-08-13

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