Type the traditional command, present on Sendmail, Postfix and Exim alike, that lists the messages currently waiting in the local mail queue.
LPIC-1 Exam 102-500, objective 108. Essential system services easy
Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.
Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.
How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
Answer
Type the answer.
Accepted answers
mailqsendmail -bp/usr/bin/mailq
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
mailq prints the outbound queue: each message's queue id, size, arrival time, sender and pending recipients, plus the reason delivery is deferred. It is historically the same program as `sendmail -bp`, and every common MTA ships a compatible version, which is why LPI treats it as MTA-neutral. Postfix additionally offers postqueue -p for the same listing and postsuper for removing or requeueing messages.
Where this comes from
- Cited
- LPI exam objective 108.3
- What it says
- Inspect the local mail queue.
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 108 and space the ones you get wrong.
More questions on this objective
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- On a systemd host, type the single command that turns on automatic network time synchronisation (do not include a path). machine-checked