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

1.08.2Basic

Display the current user's crontab without changing it.

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.

crontab -l: Lists the current user's crontab without opening it for editing.
crontab -e: Opens the current user's crontab in the configured editor.
crontab -r: Removes the current user's entire crontab.
crontab -i: Requests confirmation when used with a destructive crontab removal.

Detailed explanation

Incorrectcrontab -e

Incorrect. -e opens the crontab for editing.

Incorrectcrontab -r

Incorrect. -r removes the crontab.

Correctcrontab -l

Correct. -l lists the current crontab.

Incorrectcrontab -i

Incorrect. -i confirms removal with -r; it does not list entries.

An example you can run in a temporary verification environment.

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

list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-102-1039

Environmentcron crontab help / 登録内容を変更しない

Last technical review2026-08-13

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