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LFCS Storage Management Practice Question

Which of the following commands can be used to display the total, used, and available space for all mounted ext4 filesystems?

⚠ Common exam trap

It's easy for candidates to confuse `lsblk` or `fdisk -l` as disk space commands, but these tools show partition layout or device information, not filesystem-level usage statistics like total, used, and available space.

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 -hT

The `df -hT` command displays disk space usage for all mounted filesystems, with the `-h` flag providing human-readable sizes (e.g., GB, MB) and the `-T` flag showing the filesystem type (e.g., ext4). This directly meets the requirement to show total, used, and available space for all mounted ext4 filesystems.

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 not space usage.

  • ✗

    fdisk -l

    Why it's wrong here

    fdisk shows partition tables, not mounted filesystem usage.

  • ✓

    df -hT

    Why this is correct

    df -hT shows mounted filesystems with type and usage.

  • ✗

    tune2fs -l /dev/sda1

    Why it's wrong here

    tune2fs shows superblock info, not usage.

About these practice questions

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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.