Selecting a primary group | LinuC Level 1 102 Exam original practice question

1.08.1Basic

Create user hana with existing group developers as the primary group.

Which command is appropriate?

Hint 1: Focus on account attributes

Separate account creation, home-directory handling, group membership, login identity, and password state before comparing the commands.

Hint 2: Key terms

Review the short definitions of account records, groups, home directories, shells, and password state involved.

Primary group: The single default group recorded as the user's primary GID.
Supplementary groups: Additional groups that contribute membership-based access.
-g: The option that selects the primary group.
Supplementary-group option: The option that supplies supplementary-group membership.

Detailed explanation

Incorrectuseradd -G developers hana

Incorrect. -G specifies supplementary groups.

Incorrectuseradd -s developers hana

Incorrect. -s specifies the login shell.

Incorrectuseradd -d developers hana

Incorrect. -d specifies the home directory.

Correctuseradd -g developers hana

Correct. -g developers selects the primary group.

An example you can run in a temporary verification environment.

useradd --help | grep -E -- '-g,|-G,'

--gidと--groupsの説明行

Foundation review

Identity attributes such as a user ID, home directory, and login shell.

Primary and supplementary groups used during permission checks.

State and time limits that control password changes and account access.

Question IDKL-102-1016

Environmentshadow-utils useradd help / 状態変更なし

Last technical review2026-08-13

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