Detaching a filesystem | LPIC-1 101-500 Exam original practice question

104.3Basic

Detach the filesystem mounted at /mnt/data using the normal procedure.

Open files, processes, and working directories have already been checked.

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.

mount /mnt/data: Incorrect. mount attaches a filesystem rather than detaching it.
unlink /mnt/data: Incorrect. unlink removes a directory entry and is not a mount operation.
rmdir /mnt/data: Incorrect. rmdir cannot remove a mounted directory in the intended way.
umount /mnt/data: Correct. umount /mnt/data detaches the mounted filesystem.

Detailed explanation

Incorrectmount /mnt/data

Incorrect. mount attaches a filesystem rather than detaching it.

Incorrectunlink /mnt/data

Incorrect. unlink removes a directory entry and is not a mount operation.

Incorrectrmdir /mnt/data

Incorrect. rmdir cannot remove a mounted directory in the intended way.

Correctumount /mnt/data

Correct. umount /mnt/data detaches the mounted filesystem.

An example you can run in a temporary verification environment.

umount --fake /mnt/data

fake指定により実際のumountシステムコールは行わない

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 IDKP-104-250

Environmentutil-linux umount 2.39以降

Last technical review2026-08-12