easyMultiple Select
XK0-006 Practice Question: Which TWO commands display disk usage information…
Which TWO commands display disk usage information for filesystems? (Select 2.)
⚠ Common exam trap
A common pitfall on the CompTIA Linux+ exam is confusing filesystem usage commands (df, du) with partition management tools (fdisk, parted) or file listing commands (ls).
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
The `df` command (disk free) reports the amount of available and used disk space on all mounted filesystems, while `du` (disk usage) estimates file and directory space usage. Both commands are standard tools for displaying disk usage information for filesystems in Linux.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ls
Why it's wrong here
ls lists directory entries and file metadata, not filesystem capacity or inode consumption. It is tempting because its long form shows file sizes, but that is per-file, not per-filesystem usage; df and du report the disk usage figures the question requires.
- ✓
du
Why this is correct
The du command reports disk usage of files and directories, recursively summing block consumption per path. It answers how much space files occupy, satisfying the stem's requirement to display disk usage information for filesystems, complementing df's filesystem-level view.
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parted
Why it's wrong here
parted creates, resizes and removes partitions, operating on the partition table rather than reporting filesystem consumption. It is tempting because it prints disk geometry and partition sizes, but those are layout figures, not usage; df and du report the required usage.
- ✓
df
Why this is correct
The df command reports disk usage information per mounted filesystem, showing total, used and available blocks plus mount points. It directly satisfies the stem's requirement to display filesystem disk usage, unlike du, which measures individual file and directory consumption.
- ✗
fdisk
Why it's wrong here
fdisk partitions block devices, editing the partition table rather than reporting filesystem usage. It is tempting because it displays disk and partition geometry, which looks like usage data, but it shows no capacity consumed; df and du provide the required filesystem usage.
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