Stopping and disabling a systemd service | LinuC Level 1 102 Exam original practice question

1.10.2Basic

demo.service is no longer needed.

Stop it now and prevent it from starting at the next boot.

Which command is appropriate?

Hint 1: Focus on security boundaries

Separate protected account data, service availability directives, and packet-filtering policy before comparing the choices.

Hint 2: Key terms

Review the short definitions of protected account data, service controls, and firewall layers involved.

systemctl disable: The systemd operation that removes a unit from boot-time activation.
--now: A modifier that applies an enable or disable change to the current unit state too.
Boot activation: The configuration relationship that starts a unit during system boot.
Runtime state: The current process state of a unit, such as active or stopped.
systemd unit: A service, mount, or other resource managed as one systemd object.

Detailed explanation

Correctsystemctl disable --now demo.service

Correct. It disables automatic start and stops the service now.

Incorrectsystemctl enable --now demo.service

Incorrect. enable --now starts and enables the service.

Incorrectsystemctl reload demo.service

Incorrect. reload rereads service configuration without stopping or disabling.

Incorrectsystemctl is-enabled demo.service

Incorrect. is-enabled only reports state.

An example you can run in a temporary verification environment.

systemctl --help 2>&1 | grep -E -- 'disable|--now' | head -n 3

disableと--nowに関するhelp行

Foundation review

Sensitive authentication data stored separately from ordinary account records.

Whether a service can start automatically or be activated on demand.

A host firewall rule set that permits or rejects network packets.

Question IDKL-102-1137

Environmentsystemd systemctl help / unit変更なし

Last technical review2026-08-20

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