Locking password authentication | LinuC Level 1 102 Exam original practice question

1.08.1Basic

Lock guest01's password field and temporarily stop password authentication.

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.

usermod -L: The usermod form that locks password-based authentication for an account.
Password lock: A state in which the stored password value cannot authenticate normally.
Shadow field: The protected account database field that stores password and aging data.
Account expiration: A separate account-lifetime setting that is not the password lock state.

Detailed explanation

Incorrectusermod -U guest01

Incorrect. -U unlocks the password field.

Correctusermod -L guest01

Correct. -L applies the password lock.

Incorrectusermod -l guest01

Incorrect. Lowercase -l changes the login name.

Incorrectusermod -e guest01

Incorrect. -e sets an account expiration date and requires a date.

An example you can run in a temporary verification environment.

usermod --help | grep -E -- '-L,|--lock'

password lock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-102-1022

Environmentshadow-utils usermod help / 状態変更なし

Last technical review2026-08-13

More practice in this area