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

1.08.2Basic

Edit the current user's crontab through the standard editor workflow and validation.

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 -e: Opens the current user's crontab for editing and installation.
crontab -l: Prints the current user's crontab entries.
crontab -r: Deletes the current user's complete crontab.
crontab -u: Selects a user account for an administrative crontab operation.

Detailed explanation

Incorrectcrontab -l

Incorrect. -l only lists entries.

Incorrectcrontab -r

Incorrect. -r deletes all entries.

Incorrectcrontab -u

Incorrect. -u selects a user and needs another operation; alone it does not edit.

Correctcrontab -e

Correct. -e opens the current user's crontab for editing.

An example you can run in a temporary verification environment.

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

edit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-102-1040

Environmentcron crontab help / エディタは起動しない

Last technical review2026-08-13

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