Displaying ext4 superblock settings | LinuC Level 1 101 Exam original practice question

1.05.3Basic

Inspect ext4 UUID, label, block counts, reserved blocks, and check intervals without changing /dev/vgdata/lvdocs.

Which command is appropriate?

Hint 1: Focus on the requirement

Choose the read-only tune2fs listing option rather than a label change or filesystem recreation.

Hint 2: Key terms

Review the short filesystem and storage definitions before comparing the choices.

tune2fs -l / -L: -l lists ext attributes, while -L changes the filesystem label.
Superblock: Metadata containing core filesystem properties.
UUID: The identifier stored in the filesystem metadata.
Filesystem label: A human-assigned name for an ext filesystem.

Detailed explanation

Incorrecttune2fs -L docs /dev/vgdata/lvdocs

Incorrect. -L changes the filesystem label.

Correcttune2fs -l /dev/vgdata/lvdocs

Correct. tune2fs -l displays the superblock settings.

Incorrectmkfs.ext4 /dev/vgdata/lvdocs

Incorrect. mkfs.ext4 recreates the filesystem.

Incorrectmount -l /dev/vgdata/lvdocs

Incorrect. mount -l concerns mount listings rather than detailed superblock data.

An example you can run in a temporary verification environment.

tune2fs -h 2>&1 | sed -n '1,14p'

-lを含むtune2fsの使用法

Environment: e2fsprogs tune2fs / ヘルプ表示のみ
Prefer help or version output and a disposable device when testing storage commands.
Formatting, repair, and mount changes can affect data or availability.

Foundation review

The same utility can inspect or modify metadata, so the option determines the side effect.

Record current values before making an ext metadata change.

Question IDKL-101-595

Environmente2fsprogs tune2fs / ヘルプ表示のみ

Last technical review2026-08-13

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