XK0-006 Troubleshooting Practice Question
A Linux server fails to boot and drops into a GRUB prompt. The administrator needs to boot into single-user mode to repair the system. Which GRUB command should be added to the kernel line temporarily?
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
✓
single
Adding 'single' to the kernel boot parameters boots into single-user mode.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
single
Why this is correct
Adding 'single' boots into single-user mode.
- ✗
rd.break
Why it's wrong here
rd.break breaks before switch_root, not single-user mode.
- ✗
systemd.unit=rescue.target
Why it's wrong here
This is correct for systemd, but the question specifies 'single' as traditional method.
- ✗
debug
Why it's wrong here
debug enables verbose kernel messages, not single-user mode.
Go deeper
Related to this question
Learn chapter
Linux Fundamentals and History
Key term
Linux
Linux is an open-source operating system that manages computer hardware and software, widely used in servers, desktops, and embedded systems.
Key term
User
A user is any person, system, or device that interacts with an IT service, resource, or identity system, typically authenticated through credentials and authorized to perform specific actions.
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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.