XK0-006 Troubleshooting Practice Question
A system administrator wants to review kernel-related log messages from the current boot session. Which journalctl command should be used to filter the kernel messages?
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
✓
journalctl -k
journalctl -k shows kernel messages from the current boot.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
journalctl -p err
Why it's wrong here
-p err filters by priority, not kernel messages.
- ✗
journalctl -b -u systemd-journald
Why it's wrong here
-u filters by unit, not kernel.
- ✓
journalctl -k
Why this is correct
-k displays kernel messages.
- ✗
journalctl --since today
Why it's wrong here
Shows logs since today, not specifically kernel messages.
Go deeper
Related to this question
Learn chapter
Process Management and System Monitoring
Key term
journalctl
Journalctl is a command-line tool used to view and query logs collected by the systemd journal, which stores system and application messages on Linux systems.
Key term
Kernel
The kernel is the core program of an operating system that manages hardware resources and provides essential services for all other software to run.
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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.