Displaying numbered command history | LinuC Level 1 101 Exam original practice question

1.03.1Basic

Inspect commands already run in the current interactive Bash session.

Display them together with history numbers.

Which shell builtin should be used?

Hint 1: Focus on the requirement

The requested data is Bash's interactive command history, not environment or filesystem information.

Hint 2: Key terms

Review the short shell and command-line definitions before comparing the choices.

history: A Bash builtin for displaying and managing the interactive history list.
History number: The number assigned to an entry in the history list.
Readline: The library that provides Bash input editing and history search.
Environment variable: A process input value that is separate from command history.

Detailed explanation

Incorrectman

Incorrect. man displays manual pages and does not list session history.

Correcthistory

Correct. history prints the loaded history list with numbers.

Incorrectenv

Incorrect. env displays environment variables.

Incorrectpwd

Incorrect. pwd displays the current working directory.

An example you can run in a temporary verification environment.

bash -ic 'history -s "printf demo"; history 1' 2>/dev/null

履歴番号とprintf demoを含む1行

Foundation review

The history builtin prints command lines and their event numbers from the current session.

Remember that history visibility and persistence depend on the shell and its configuration.

Question IDKL-101-439

EnvironmentBash 5.x / 一時的な対話シェル

Last technical review2026-08-13

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