Rebuilding an alias database | LPIC-1 102-500 Exam original practice question

108.3Standard

Rebuild the database used by the MTA after editing /etc/aliases.

Which command is representative?

Hint 1: Focus on mail roles

Separate transfer, local delivery, aliases, queueing, and mailbox access before comparing the choices.

Hint 2: Key terms

Review the short definitions of mail transfer, local delivery, and mailbox access.

newaliases: A command that rebuilds the lookup database from an aliases source.
Alias database: Generated data that speeds alias lookup during delivery.
/etc/aliases: The source file from which a system-wide alias database is built.
mailq: A command that displays the delivery queue rather than updating aliases.

Detailed explanation

Incorrectmailq

Incorrect. mailq lists the delivery queue.

Incorrectmail -s aliases

Incorrect. mail creates a message.

Incorrectpostfix aliases

Incorrect. This is not the standard cross-MTA alias rebuild command.

Correctnewaliases

Correct. newaliases rebuilds the aliases database.

An example you can run in a temporary verification environment.

command -v newaliases || printf '%s\n' 'newaliases not installed'

newaliasesのpath、またはnot installed

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 IDKP-108-756

Environmentcommand pathの読取のみ

Last technical review2026-08-13

More practice in this area