LPIC-1 Devices, Filesystems and FHS Practice Question
Which of the following commands displays the amount of free disk space on all mounted filesystems in a human-readable format?
⚠ Common exam trap
Many exam-takers confuse `df -h` (free disk space) with `du -sh` (used space for a directory) or `df -i` (inode usage), because all three involve storage-related metrics but serve fundamentally different purposes.
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
✓
df -h
The `df -h` command displays disk space usage for all mounted filesystems with sizes in human-readable units (e.g., KB, MB, GB). The `-h` flag converts raw block counts into powers of 1024 with appropriate suffixes, making the output easy to interpret at a glance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
df -i
Why it's wrong here
Shows inode information, not disk space.
- ✓
df -h
Why this is correct
Correct: human-readable disk free.
- ✗
du -sh
Why it's wrong here
Shows directory size, not free space.
- ✗
df -T
Why it's wrong here
Shows filesystem type.
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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.