Renaming a login | LinuC Level 1 102 Exam original practice question

1.08.1Basic

Rename existing user oldname to newname.

Which 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.

usermod -d newname oldname: Incorrect. -d changes the home-directory path.
usermod -g newname oldname: Incorrect. -g changes the primary group.
usermod -l newname oldname: Correct. It changes oldname to newname.
usermod -s newname oldname: Incorrect. -s changes the login shell.

Detailed explanation

Incorrectusermod -d newname oldname

Incorrect. -d changes the home-directory path.

Incorrectusermod -g newname oldname

Incorrect. -g changes the primary group.

Correctusermod -l newname oldname

Correct. It changes oldname to newname.

Incorrectusermod -s newname oldname

Incorrect. -s changes the login shell.

An example you can run in a temporary verification environment.

usermod --help | grep -E -- '-l,|--login'

新しいログイン名を示す説明行

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-102-1019

Environmentshadow-utils usermod help / 状態変更なし

Last technical review2026-08-13