The correct answer is that the user is a system account that should not log in interactively. The /sbin/nologin shell is assigned to system accounts like bin, daemon, or adm to enforce a strict security boundary: when any login attempt is made, this shell immediately prints a polite "This account is currently not available" message and exits, preventing any interactive session while still allowing the account to own files or run background processes. On the Red Hat Certified System Administrator EX200 exam, this concept tests your understanding of user account types and the purpose of non-standard shells listed in /etc/passwd. A common trap is confusing /sbin/nologin with /bin/false—both block logins, but nologin provides a user-friendly message, making it the standard for system accounts in Red Hat. Memory tip: think "nologin = no login shell, but still a working system user."
EX200 Essential Tools Practice Question
This EX200 practice question tests your understanding of essential tools. 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.
Exhibit
Refer to the exhibit.
$ cat /etc/passwd | head -3
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
Refer to the exhibit. Why does the 'bin' user have /sbin/nologin as its shell?
Refer to the exhibit.
$ cat /etc/passwd | head -3
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
A
The user's home directory is missing.
Why wrong: Not related.
B
The user is a system account that should not log in interactively.
System accounts use nologin.
C
The user is locked.
Why wrong: Locked accounts have ! in password field.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The user is a system account that should not log in interactively.
Option B is correct because the /sbin/nologin shell is explicitly assigned to system accounts like 'bin' to prevent interactive logins. This shell prints a message and exits, ensuring that the account can only be used for non-interactive system processes, such as owning files or running daemons, without providing a login session.
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.
✗
The user's home directory is missing.
Why it's wrong here
Not related.
✓
The user is a system account that should not log in interactively.
Why this is correct
System accounts use nologin.
Related concept
Read the scenario before looking for a memorised answer.
✗
The user is locked.
Why it's wrong here
Locked accounts have ! in password field.
✗
The shell is not installed.
Why it's wrong here
It is installed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Red Hat often tests the distinction between a locked account (password disabled) and a non-interactive shell (shell set to /sbin/nologin), leading candidates to confuse the two mechanisms for restricting access.
Detailed technical explanation
How to think about this question
The /sbin/nologin shell is defined in /etc/shells as a valid login shell but behaves as a 'false' shell, printing a configurable message (via /etc/nologin.txt) and exiting with a non-zero status. System accounts like 'bin', 'daemon', and 'adm' are created with this shell to comply with the principle of least privilege, ensuring they cannot be used for interactive SSH or console logins even if the password is known.
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 practitioner preparing for the EX200 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
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: The user is a system account that should not log in interactively. — Option B is correct because the /sbin/nologin shell is explicitly assigned to system accounts like 'bin' to prevent interactive logins. This shell prints a message and exits, ensuring that the account can only be used for non-interactive system processes, such as owning files or running daemons, without providing a login session.
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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