This EX200 practice question tests your understanding of essential tools. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 they cannot use the 'systemctl' command to manage services. The user is part of the 'wheel' group. Which configuration change is required to allow this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure /etc/polkit-1/rules.d/10-admin.rules includes an admin rule for the wheel group
The 'systemctl' command requires PolicyKit authorization for non-root users to manage systemd services. The correct configuration is to add a PolicyKit rule in /etc/polkit-1/rules.d/10-admin.rules that grants the 'wheel' group administrative privileges, allowing them to invoke systemctl without a password or with appropriate authentication.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Set the 'permissive' mode for systemd via systemd.conf
Why it's wrong here
No such configuration; polkit is separate.
✗
Add the user to the 'systemd-journal' group
Why it's wrong here
That group has journal access, not service management.
✗
Add the user to /etc/sudoers with 'ALL ALL=(ALL) ALL'
Why it's wrong here
sudo is not used by systemctl; polkit handles authorization.
✓
Ensure /etc/polkit-1/rules.d/10-admin.rules includes an admin rule for the wheel group
Why this is correct
polkit rules grant systemctl permissions to members of wheel.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse group membership (like 'wheel' for sudo) with direct authorization via PolicyKit, assuming being in the 'wheel' group automatically grants all administrative privileges, when in fact systemctl relies on polkit rules for non-root users.
Detailed technical explanation
How to think about this question
PolicyKit (polkit) is the authorization framework used by systemd to control access to privileged operations. The rule file '10-admin.rules' typically contains JavaScript-like rules that check if the user is in the 'wheel' group and then grant 'org.freedesktop.systemd1.manage-units' action. Without this rule, a user in the 'wheel' group can still use sudo to run systemctl, but direct invocation fails because systemctl checks polkit first.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Essential Tools — This question tests Essential Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure /etc/polkit-1/rules.d/10-admin.rules includes an admin rule for the wheel group — The 'systemctl' command requires PolicyKit authorization for non-root users to manage systemd services. The correct configuration is to add a PolicyKit rule in /etc/polkit-1/rules.d/10-admin.rules that grants the 'wheel' group administrative privileges, allowing them to invoke systemctl without a password or with appropriate authentication.
What should I do if I get this EX200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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