Changing only the owning group | LinuC Level 1 101 Exam original practice question

1.02.1Basic

Keep notes.txt's owner and change its owning group to writers.

Which direct command is appropriate?

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

chmod writers notes.txt: Incorrect. chmod changes permissions, not ownership.
chown writers notes.txt: Incorrect. chown writers notes.txt treats writers as the owner.
chgrp writers notes.txt: Correct. chgrp writers notes.txt changes only the owning group.
groups writers notes.txt: Incorrect. groups displays memberships rather than changing file ownership.

Detailed explanation

Incorrectchmod writers notes.txt

Incorrect. chmod changes permissions, not ownership.

Incorrectchown writers notes.txt

Incorrect. chown writers notes.txt treats writers as the owner.

Correctchgrp writers notes.txt

Correct. chgrp writers notes.txt changes only the owning group.

Incorrectgroups writers notes.txt

Incorrect. groups displays memberships rather than changing file ownership.

An example you can run in a temporary verification environment.

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

chgrpの使用法。実ファイルのグループは変更しない

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKL-101-381

EnvironmentGNU coreutils 9.x / helpのみ

Last technical review2026-08-13