Quick Answer
The answer is `pgrep cron`. This command searches the process table for any process named 'cron' and returns its process ID (PID) if the daemon is running, making it a quick and reliable method to verify the cron daemon is running without parsing lengthy process lists or relying on systemd-specific tools. On the Linux Professional Institute Certification Level 1 LPIC-1 exam, this question tests your ability to troubleshoot cron job failures efficiently; a common trap is reaching for `systemctl status cron` or `ps aux | grep cron`, but `pgrep` is more direct and works on any init system. Remember that `pgrep` returns only the PID on success and nothing on failure, so you can use it in scripts or as a one-liner. Memory tip: think "pgrep = process grep" — it’s the fastest way to confirm a daemon is alive.
This LPIC-1 practice question tests your understanding of administrative tasks. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A user reports that a cron job is not executing. The cron job is defined in /etc/crontab. The administrator checks the system logs and finds no errors. Which command should the administrator use to verify that the cron daemon is running?
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.
pgrep cron
Returns PID if cron is running, gives no output if not.
systemctl status cron
Why wrong: Valid but not listed; also requires systemd.
crontab -l
Why wrong: Lists user's crontab, does not check daemon.
ps aux | grep cron
Why wrong: This works but is not the most direct method; also may show grep itself.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
pgrep cron
Option A is correct because `pgrep cron` searches the process table for processes named 'cron' and returns the PID(s) if running. This is a quick, reliable way to verify the cron daemon is active without parsing full process lists or relying on systemd-specific commands.
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.
pgrep cron
Why this is correct
Returns PID if cron is running, gives no output if not.
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 status cron
Why it's wrong here
Valid but not listed; also requires systemd.
crontab -l
Why it's wrong here
Lists user's crontab, does not check daemon.
ps aux | grep cron
Why it's wrong here
This works but is not the most direct method; also may show grep itself.
Common exam traps
The trap here is that candidates may choose `systemctl status cron` assuming all Linux systems use systemd, or `ps aux | grep cron` without realizing it can produce false matches, while `pgrep cron` is the most portable and precise command for checking if a process is running.
Trap categories for this question
Command / output trap
This works but is not the most direct method; also may show grep itself.
Detailed technical explanation
The cron daemon (typically cronie or vixie-cron) runs as a background process and reads /etc/crontab and user crontabs. Using `pgrep` is efficient because it uses the /proc filesystem to match process names exactly, avoiding the need to parse output. In real-world scenarios, a cron job might fail due to environment issues (e.g., missing PATH) even if the daemon is running, so verifying the daemon is just the first 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 LPIC-1 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.
Administrative Tasks — study guide chapter
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Administrative Tasks practice questions
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FAQ
Administrative Tasks — This question tests Administrative Tasks — Read the scenario before looking for a memorised answer..
The correct answer is: pgrep cron — Option A is correct because `pgrep cron` searches the process table for processes named 'cron' and returns the PID(s) if running. This is a quick, reliable way to verify the cron daemon is active without parsing full process lists or relying on systemd-specific commands.
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.
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Last reviewed: Jun 11, 2026
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.
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