20+ practice questions focused on Manage security — one of the most tested topics on the Red Hat Certified System Administrator EX200 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Manage security PracticeWhich THREE factors determine whether a local user can SSH into a Red Hat Enterprise Linux 9 system? (Choose three.)
Explanation: SSHd validates that the user's login shell is listed in /etc/shells before allowing authentication. If the shell is not present in /etc/shells (e.g., /sbin/nologin or a custom script), SSHd will deny the connection, even if the user has valid credentials. This check is controlled by the 'AllowUsers' and 'DenyUsers' directives but is a fundamental security measure to prevent users with non-standard shells from gaining interactive access.
Refer to the exhibit. A web server (httpd) is unable to serve files from a user's home directory. What is the most appropriate single command to resolve the issue?
Explanation: SELinux policy by default blocks httpd from reading user home directories via the httpd_enable_homedirs boolean, which is off. The command 'setsebool -P httpd_enable_homedirs on' enables this boolean and directly allows httpd to serve files from user home directories. Option C only sets the file context to httpd_sys_content_t, which is insufficient without the boolean because httpd still cannot traverse the user home directory path.
A sysadmin wants to allow user 'alice' to run all commands as root via sudo. Which line should be added to /etc/sudoers?
Explanation: The sudoers entry 'alice ALL=(root) ALL' grants user alice permission to run any command as root on any host, exactly matching the requirement. Option C ('alice ALL=(ALL) ALL') allows running commands as any user, which is more permissive than needed. Option B restricts the host to 'localhost' and allows running as any user, so it is not the best fit. Option D uses '%alice' which refers to a group, not a user, and is therefore incorrect.
A user reports that SSH key-based authentication fails, but password authentication works. The admin checks /etc/ssh/sshd_config: PubkeyAuthentication yes, PasswordAuthentication no (contrary to the report). Which is the most likely reason key-based auth fails?
Explanation: SSH key-based authentication requires that the ~/.ssh directory and its contents have restrictive permissions. If the .ssh directory has permissions 755, it is world-readable, which violates SSH's security model. SSH daemon (sshd) will refuse to use the authorized_keys file if the directory permissions are too permissive, causing key-based authentication to fail even though PubkeyAuthentication is enabled.
Refer to the exhibit. A host in the 192.168.1.0/24 network is unable to access a web service running on this server on port 8080. What is the most likely reason?
Explanation: A rich rule that accepts HTTP traffic on port 80 only adds an allow rule. It does not affect traffic on other ports. Unmatched traffic falls through to the zone's default target. For the internal zone, the default target is ACCEPT, so port 8080 would not be blocked by that rule alone. To block port 8080, the default target would need to be drop/reject or an explicit reject/drop rule would need to exist.
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Practice all Manage security questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Manage security. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Manage security questions on the EX200 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Manage security is tested as part of the Red Hat Certified System Administrator EX200 blueprint. Practicing with targeted Manage security questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Manage security is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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