Sending command output to the journal | LinuC Level 1 102 Exam original practice question

1.09.2Basic

Run /usr/local/bin/healthcheck and send both output streams to the journal with identifier healthcheck.

Which command is appropriate?

Hint 1: Focus on journal storage

Separate persistent storage, runtime-only storage, automatic selection, and disabled storage behavior.

Hint 2: Key terms

Review the short definitions of journal storage, persistence, rotation, and runtime behavior involved.

systemd-cat: A command that connects a command's standard output and error to the systemd journal.
-t: The option that assigns an identifying syslog identifier to recorded entries.
journalctl: A command that searches and displays entries stored in the journal.
logger: A command that generates and sends a syslog message.
rsyslogd: A daemon that receives and routes syslog messages.
-f: The logger option that reads a specified file as message input.

Detailed explanation

Incorrectjournalctl -t healthcheck /usr/local/bin/healthcheck

Incorrect. journalctl -t filters existing logs.

Incorrectlogger -t healthcheck -f /usr/local/bin/healthcheck

Incorrect. logger -f reads file contents and does not execute the command.

Incorrectrsyslogd -t healthcheck /usr/local/bin/healthcheck

Incorrect. rsyslogd does not launch a child command this way.

Correctsystemd-cat -t healthcheck /usr/local/bin/healthcheck

Correct. systemd-cat connects the child output to journald.

An example you can run in a temporary verification environment.

systemd-cat --help | grep -E -- '--identifier|-t' | head -n 1

identifierを示すhelp行

Foundation review

Metadata that classifies a message source and its severity.

Whether systemd journal data survives a reboot and where it is stored.

A process that retains, renames, compresses, or removes log generations.

Question IDKL-102-1084

Environmentsystemd-cat help / 子コマンド実行なし

Last technical review2026-08-13

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