LPIC-1 Devices, Filesystems and FHS Practice Question
After plugging in a USB storage device, the system does not automatically mount it. The 'lsusb' command shows the device. What is the first command to check if the kernel detected the block device?
⚠ Common exam trap
Many exam-takers assume 'lsblk' or 'mount' are the first commands to check, but they only show devices that have already been fully registered or mounted, not the raw kernel detection event that 'dmesg' captures.
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
✓
dmesg
The 'dmesg' command displays kernel ring buffer messages, which include hardware detection and driver initialization logs. When a USB storage device is plugged in, the kernel logs the device's recognition, including the assigned block device name (e.g., /dev/sdb). Checking 'dmesg' is the first step to confirm that the kernel has detected the block device, even if it is not automatically mounted.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
lsblk
Why it's wrong here
lsblk lists block devices but may not show the device if kernel didn't detect it properly.
- ✗
mount
Why it's wrong here
mount shows currently mounted filesystems, not newly attached devices.
- ✓
dmesg
Why this is correct
dmesg displays kernel ring buffer messages, which include device detection.
- ✗
fdisk
Why it's wrong here
fdisk is for partitioning, not for checking device detection.
Go deeper
Related to this question
About these practice questions
This LPIC-1 question is part of Courseiva's 527-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.