easyMultiple ChoiceObjective-mapped
XK0-006 Troubleshoot a system that is not booting Practice Question
A technician needs to troubleshoot a system that is not booting. Which of the following is the most appropriate first step when using a rescue environment?
⚠ Common exam trap
The trap here is that candidates often jump to checking logs or running fsck first, not realizing that without mounting the root filesystem, those actions are either impossible or operate on the rescue environment's own filesystem rather than the broken system's data.
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
✓
Mount the root filesystem to /mnt/sysimage.
When using a rescue environment, the first priority is to gain access to the system's configuration and log files by mounting the root filesystem. Mounting to /mnt/sysimage (a conventional mount point in Red Hat-based rescue modes) allows the technician to chroot into the environment and treat it as the running system, enabling further troubleshooting steps like checking logs or repairing the bootloader. This step is foundational because without the root filesystem mounted, commands like checking logs or running fsck cannot operate on the actual system data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Mount the root filesystem to /mnt/sysimage.
Why this is correct
This is the standard procedure to access the installed system from the rescue environment.
- ✗
Check the system logs in /var/log/messages.
Why it's wrong here
You cannot access logs until the filesystem is mounted.
- ✗
Run fsck on all partitions.
Why it's wrong here
fsck may be necessary, but first you need to mount the root filesystem to assess the situation.
- ✗
Reinstall the bootloader immediately.
Why it's wrong here
Reinstalling the bootloader should be done after understanding the issue, not as the first step.
Go deeper
Related to this question
Learn chapter
Navigating the Filesystem
Key term
fsck
fsck is a command-line tool that checks and repairs inconsistencies in a file system, ensuring data integrity.
Key term
Mount
Mounting is the process of making a file system or storage device accessible to a computer's operating system by attaching it to a specific directory in the existing directory tree.
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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.