Using a stable fstab identifier | LinuC Level 1 101 Exam original practice question

1.05.3Basic

Mount the same ext4 filesystem at /srv/docs even if disk detection order changes.

Its UUID is 1111-2222.

Which value belongs in the first fstab field?

Hint 1: Focus on the requirement

Choose the source identifier that follows the filesystem rather than the discovery order of device nodes.

Hint 2: Key terms

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

UUID=: An fstab source form that selects a filesystem by UUID.
/dev/sdX: A device-node path whose letter can change with discovery order.
blkid: Reports the UUID-to-device correspondence.
fstab: The file used to persist mount source and target settings.

Detailed explanation

Incorrect/dev/sdb1

Incorrect. /dev/sdb1 can change when device detection order changes.

Incorrect/srv/docs

Incorrect. /srv/docs is the mount target, not the source identifier.

CorrectUUID=1111-2222

Correct. UUID=1111-2222 identifies the filesystem for fstab.

IncorrectTYPE=ext4

Incorrect. TYPE=ext4 is not unique when multiple ext4 filesystems exist.

An example you can run in a temporary verification environment.

findmnt --verify --verbose 2>&1 | sed -n '1,12p'

現在のfstab構文・参照先の検証結果。環境設定により警告が出る場合がある

Environment: util-linux findmnt / 読み取り検証
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

A filesystem UUID identifies the content; a mount point identifies where it is attached.

Update fstab if the filesystem is recreated and receives a new UUID.

Question IDKL-101-588

Environmentutil-linux findmnt / 読み取り検証

Last technical review2026-08-13

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