XK0-006 Security Practice Question
To harden SSH, an administrator needs to disable root login over SSH. Which directive should be set in /etc/ssh/sshd_config?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
PermitRootLogin no
PermitRootLogin no prevents root from logging in via SSH.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
RootLogin no
Why it's wrong here
Incorrect syntax.
- ✓
PermitRootLogin no
Why this is correct
Correct directive to disable root login.
- ✗
DenyUsers root
Why it's wrong here
DenyUsers is not a standard sshd_config directive.
- ✗
AllowUsers root
Why it's wrong here
AllowUsers lists allowed users, including root.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.