Changing only a file owner | LinuC Level 1 101 Exam original practice question

1.02.1Basic

As administrator, change report.txt's owner to alice while keeping its group.

Which command is appropriate?

Hint 1: Focus on the requirement

Separate changing the owner from changing the owning group and select the owner-only form.

Hint 2: Key terms

Review the short definitions before comparing the ownership and permission choices.

chown: A command for changing the owner and optionally the owning group of a file.
Owner field: The user portion of a file's ownership metadata.
Owning group: The group portion of a file's ownership metadata.
chgrp: A command dedicated to changing a file's owning group.

Detailed explanation

Incorrectchgrp alice report.txt

Incorrect. chgrp changes the group.

Incorrectchmod alice report.txt

Incorrect. chmod changes mode bits.

Incorrectchown :alice report.txt

Incorrect. chown :alice changes the group to alice.

Correctchown alice report.txt

Correct. chown alice report.txt changes only the owner.

An example you can run in a temporary verification environment.

chown --help | sed -n '1,3p'

chownの使用法。実ファイルの所有者は変更しない

Environment: GNU coreutils 9.x / helpのみ
Use a disposable file or directory when checking chmod calculations.
Exact permission display can vary slightly with filesystem and distribution defaults.

Foundation review

A chown specification containing only an owner changes that field while leaving the group unspecified.

Verify the current owner and group before applying an ownership change that may require privilege.

Question IDKL-101-380

EnvironmentGNU coreutils 9.x / helpのみ

Last technical review2026-08-13

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