This LFCS practice question tests your understanding of service configuration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator deploys a new custom service using a unit file called myapp.service. The service needs to start automatically at system boot. Which command should the administrator run to achieve this?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
systemctl start myapp.service
Why wrong: Starts the service now but does not enable it for boot.
systemctl enable myapp.service
Creates symlinks to start the service at boot.
systemctl add-wants myapp.service
Why wrong: Not a valid systemctl command.
systemctl daemon-reload myapp.service
Why wrong: Reloads the daemon, not enable.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
systemctl enable myapp.service
The `systemctl enable` command creates the necessary symlinks in the systemd unit configuration directories (e.g., `/etc/systemd/system/multi-user.target.wants/`) to ensure the service is started automatically at boot. This is the correct method to enable a service to start on boot in a systemd-based Linux system.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
systemctl start myapp.service
Why it's wrong here
Starts the service now but does not enable it for boot.
systemctl enable myapp.service
Why this is correct
Creates symlinks to start the service at boot.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
systemctl add-wants myapp.service
Why it's wrong here
Not a valid systemctl command.
systemctl daemon-reload myapp.service
Why it's wrong here
Reloads the daemon, not enable.
Common exam traps
The trap here is that candidates confuse `systemctl start` (which runs the service now) with `systemctl enable` (which configures automatic startup at boot), leading them to select option A incorrectly.
Trap categories for this question
Command / output trap
Not a valid systemctl command.
Detailed technical explanation
Under the hood, `systemctl enable` creates a symbolic link from the unit file in `/usr/lib/systemd/system/` (or `/etc/systemd/system/`) into the appropriate `.wants/` directory of the target (e.g., `multi-user.target.wants/`). This tells systemd to start the service when that target is reached during boot. A subtle behavior is that `systemctl enable` does not start the service immediately; a separate `systemctl start` is needed for the current session. In real-world scenarios, administrators often combine both commands: `systemctl enable --now myapp.service` to enable and start in one step.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the LFCS exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Service Configuration — study guide chapter
Learn the concepts, then practise the questions
Service Configuration practice questions
Targeted practice on this topic area only
All LFCS questions
513 questions across all exam domains
Linux Foundation Certified System Administrator LFCS study guide
Full concept coverage aligned to exam objectives
LFCS practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise LFCS questions linked to User and Group Management.
Practise LFCS questions linked to Operation of Running Systems.
Practise LFCS questions linked to Essential Commands.
Practise LFCS questions linked to Networking.
Practise LFCS questions linked to Service Configuration.
Practise LFCS questions linked to Storage Management.
Practise LFCS questions linked to LFCS fundamentals.
Practise LFCS questions linked to LFCS scenario.
Practise LFCS questions linked to LFCS troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Service Configuration — This question tests Service Configuration — Read the scenario before looking for a memorised answer..
The correct answer is: systemctl enable myapp.service — The `systemctl enable` command creates the necessary symlinks in the systemd unit configuration directories (e.g., `/etc/systemd/system/multi-user.target.wants/`) to ensure the service is started automatically at boot. This is the correct method to enable a service to start on boot in a systemd-based Linux system.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 25, 2026
This LFCS practice question is part of Courseiva's free Linux Foundation certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LFCS exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.