Catching up jobs after downtime | LinuC Level 1 102 Exam original practice question

1.08.2Basic

A laptop is powered off overnight.

Run daily maintenance after startup when its scheduled time was missed.

Which mechanism is appropriate?

Hint 1: Focus on the scheduling model

Separate recurring schedules, one-time jobs, access-control files, and catch-up behavior before comparing the commands or settings.

Hint 2: Key terms

Review the short definitions of recurring schedules, one-time jobs, access-control files, and catch-up behavior involved.

anacron: A scheduler that tracks day-based jobs and can run overdue work after startup.
cron: A scheduler that evaluates recurring jobs at specified times while the system is running.
Catch-up execution: Running a periodic job after its scheduled time was missed during downtime.
Periodic job: A task that becomes eligible repeatedly according to a recurring interval.

Detailed explanation

Incorrectユーザーcrontabだけを使う

Incorrect. Ordinary cron does not normally catch up jobs missed while powered off.

Incorrectatqだけを使う

Incorrect. atq only lists one-time jobs.

Correctanacronを使う

Correct. anacron is designed for this intermittent-host behavior.

Incorrectatrmを使う

Incorrect. atrm removes at jobs.

An example you can run in a temporary verification environment.

anacron --help 2>&1 | sed -n '1,10p'

anacronの使用方法

Foundation review

A scheduler for recurring jobs described by a time-field table.

A scheduler for one-time jobs queued for a specified time.

A scheduler that can run periodic jobs after a system was unavailable.

Question IDKL-102-1051

Environmentanacron help / ジョブ実行なし

Last technical review2026-08-13

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