Specifying only a group with chown | LinuC Level 1 101 Exam original practice question

1.02.1Basic

Keep deploy.sh's owner and change only its owning group to ops using chown.

Which form is appropriate?

Hint 1: Focus on the requirement

Read the owner and group fields around the colon; an empty owner field preserves the owner.

Hint 2: Key terms

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

OWNER:GROUP: The chown notation that can specify both ownership fields.
:GROUP: The chown form that leaves the owner unchanged and selects a group.
OWNER:: A chown form that selects an owner and may use that user's login group.
Group ownership: The group identity recorded on a filesystem object.

Detailed explanation

Incorrectchown ops deploy.sh

Incorrect. chown ops deploy.sh treats ops as the owner.

Correctchown :ops deploy.sh

Correct. chown :ops deploy.sh preserves the owner and changes the group.

Incorrectchown ops: deploy.sh

Incorrect. chown ops: can change the owner and may set its login group.

Incorrectchown .:ops deploy.sh

Incorrect. The dot form is not the standard portable syntax here.

An example you can run in a temporary verification environment.

chown --help | sed -n '1,5p'

OWNER[:[GROUP]]形式を含む使用法。属性変更は行わない

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

The colon separates owner and group; which side is empty determines which ownership field is preserved.

Use the explicit form that matches the intended field and verify the result with a read-only listing.

Question IDKL-101-382

EnvironmentGNU coreutils 9.x / helpのみ

Last technical review2026-08-13

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