Unmounting a filesystem | LinuC Level 1 101 Exam original practice question

1.05.3Basic

Safely detach the filesystem mounted at /srv/docs.

No process is using it.

Which command is appropriate?

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

umount /srv/docs: Correct. umount /srv/docs detaches the mounted filesystem.
mount /srv/docs: Incorrect. mount attaches a filesystem.
rm -rf /srv/docs: Incorrect. Removing the directory does not unmount the filesystem.
swapoff /srv/docs: Incorrect. swapoff is for swap areas rather than ordinary filesystems.

Detailed explanation

Correctumount /srv/docs

Correct. umount /srv/docs detaches the mounted filesystem.

Incorrectmount /srv/docs

Incorrect. mount attaches a filesystem.

Incorrectrm -rf /srv/docs

Incorrect. Removing the directory does not unmount the filesystem.

Incorrectswapoff /srv/docs

Incorrect. swapoff is for swap areas rather than ordinary filesystems.

An example you can run in a temporary verification environment.

umount --help | sed -n '1,14p'

filesystemをunmountする使用法

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKL-101-586

Environmentutil-linux umount / ヘルプ表示のみ

Last technical review2026-08-13