XK0-005 Question #1789: Real Exam Question with Answer & Explanation

Question

A web server will not start on a Linux server. A Linux administrator troubleshooting the issue runs a few commands, which produce the following output: Output 1: systemctl units Output 2: service status Output 3: firewall configuration Which of the following commands will allow the administrator to start the web server?

Options

• Asystemctl stop firewalld.service
• Bsystemctl daemon-reload
• Csystemctl unmask httpd.service
• Dsystemctl enable [email protected]

Explanation

If a systemd service is 'masked', it prevents it from being started, and the systemctl unmask command is used to remove this restriction.

Common mistakes.

• A. Stopping the firewall service might resolve network connection issues but would not enable a masked service to start.
• B. systemctl daemon-reload reloads systemd unit files but does not unmask a service or start one that failed for other reasons.
• D. systemctl enable is used to configure a service to start at boot, but it will fail if the service is masked.

Concept tested. Linux systemd service management, unmasking services

Reference. https://man7.org/linux/man-pages/man1/systemctl.1.html

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