XK0-006 df Practice Question
A Linux administrator needs to display the amount of disk space used by each mounted filesystem. Which two commands can be used? (Choose two.)
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
✓
du -h /
The question asks for two commands that display the amount of disk space used by each mounted filesystem. Both df -h (option E) and du -h / (option A) serve this purpose. df -h shows disk space usage for all mounted filesystems in human-readable format. du -h / shows disk usage for the root directory, which is a mounted filesystem; while du is typically used for directory-level usage, the root directory corresponds to the root filesystem, so it effectively displays the disk space used by that filesystem. mount | column -t (option B) lists mount points and options, not space usage. lsblk (option C) lists block devices, not filesystem space. fdisk -l (option D) displays partition tables, not filesystem usage. Therefore, options A and E are correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
du -h /
Why this is correct
du -h / displays the disk usage of the root directory, which corresponds to the root filesystem, thus showing the amount of disk space used by a mounted filesystem.
- ✗
mount | column -t
Why it's wrong here
mount | column -t lists mounts but does not show disk space usage.
- ✗
lsblk
Why it's wrong here
lsblk lists block devices but does not show filesystem space usage.
- ✗
fdisk -l
Why it's wrong here
fdisk -l displays partition tables, not filesystem usage.
- ✓
df -h
Why this is correct
df -h shows disk space usage for all mounted filesystems in human-readable format, directly answering the question.
Go deeper
Related to this question
Learn chapter
Linux Fundamentals and History
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.
Key term
Linux
Linux is an open-source operating system that manages computer hardware and software, widely used in servers, desktops, and embedded systems.
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