Removing the user crontab | LinuC Level 1 102 Exam original practice question

1.08.2Basic

Delete the entire crontab registered for the current user.

Which command 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.

Detailed explanation

Correctcrontab -r

Correct. It removes the current user's crontab.

Incorrectcrontab -l

Incorrect. -l lists entries.

Incorrectcrontab -e

Incorrect. -e opens the editor.

Incorrectatrm

Incorrect. atrm removes an at job by ID.

An example you can run in a temporary verification environment.

crontab --help 2>&1 | grep -E -- '-r' | head -n 1

removeを示すhelp行

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-102-1041

Environmentcron crontab help / 削除は実行しない

Last technical review2026-08-13

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