LFCS Storage Management Practice Question
An administrator needs to set the reserved block percentage on an ext4 filesystem to 1% for a non-root filesystem. Which command accomplishes this?
⚠ Common exam trap
Candidates often confuse the `-m` (percentage) and `-r` (absolute blocks) options, leading candidates to incorrectly use `-r` with a percentage value like `1%`.
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
✓
tune2fs -m 1 /dev/sdb1
The `tune2fs -m` command sets the reserved block percentage for an ext4 filesystem, and `-m 1` sets it to exactly 1%. This is the standard way to adjust reserved space on a non-root ext4 filesystem, as root filesystems typically have a default of 5% reserved for system processes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
tune2fs -m 0.5 /dev/sdb1
Why it's wrong here
Sets 0.5%, not 1%.
- ✓
tune2fs -m 1 /dev/sdb1
Why this is correct
Correct command.
- ✗
tune2fs -r 1% /dev/sdb1
Why it's wrong here
-r expects a number of blocks, not percentage.
- ✗
tune2fs -c 1 /dev/sdb1
Why it's wrong here
Sets max mount count, not reserved blocks.
Go deeper
Related to this question
About these practice questions
One of 507 original LFCS practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.