Writing local0 logs to a dedicated file | LinuC Level 1 102 Exam original practice question

1.09.2Basic

Save every local0 priority to local file /var/log/app.log.

Which rsyslog line 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.

local0: A syslog facility reserved for local applications.
*: The wildcard representing every priority in a syslog selector.
local0.*: The selector form that targets every priority of local0.
FACILITY.PRIORITY: The basic rsyslog selector form for source category and severity.
/var/log/app.log: A local file path used to store application log messages.

Detailed explanation

Correctlocal0.* /var/log/app.log

Correct. It writes all local0 messages to the local file.

Incorrect*.local0 /var/log/app.log

Incorrect. It reverses facility and priority.

Incorrectlocal0.* @/var/log/app.log

Incorrect. @ denotes remote forwarding and is not used before a local path.

Incorrect/var/log/app.log local0.*

Incorrect. The selector and action order is reversed.

An example you can run in a temporary verification environment.

printf '%s
' 'local0.* /var/log/app.log' | awk '{print $1, $2}'

local0.* /var/log/app.log

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-102-1089

EnvironmentPOSIX awk / 模擬設定のみ

Last technical review2026-08-13

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