---
name: "umount.nilfs2"
section: "8"
platform: "linux"
package: "nilfs-utils"
version: "2.3.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/umount.nilfs2"
---

# umount.nilfs2(8)

unmount NILFS2 file systems

## NAME

umount.nilfs2 - unmount NILFS2 file systems

## SYNOPSIS

**umount** \[**-t nilfs2**\] \[**-dfilnrv**\] *device* \| *dir* \[...\]

**umount.nilfs2** \[**-nrv**\] *dir* \[...\]

**umount.nilfs2** \[**-V**\]

## DESCRIPTION

**umount.nilfs2** detaches the NILFS2 file system(s) mentioned from the file hierarchy. This is the umount helper for NILFS2 to shut down the garbage collector [**nilfs\_cleanerd**(8)](/nilfs_cleanerd/8.md) before detaching the file system.  Usually it should be invoked through [**umount**(8)](/umount/8.md).

## OPTIONS

See [**umount**(8)](/umount/8.md) for the full set of options.  Commonly used options with NILFS2 are as follows:

- **-V**

  Print version and exit.

- **-i**

  Don't call **umount.nilfs2**.  Valid for [**umount**(8)](/umount/8.md).

- **-n**

  Unmount without writing in */etc/mtab*.  This option must be used carefully because **mount.nilfs2** and **umount.nilfs2** use the table to store the process ID of [**nilfs\_cleanerd**(8)](/nilfs_cleanerd/8.md).

- **-r**

  In case unmounting fails, try to remount read-only.

- **-v**

  Verbose mode.

## THE LOOP DEVICE

**umount.nilfs2** will free the loop device (if any) associated with the mount, in case it finds the option \`loop=...' in */etc/mtab*.  The -d option, which also allows [**umount**(8)](/umount/8.md) to free the loop device without the \`loop=...' option, is not supported.

## AUTHOR

**umount.nilfs2** is written by Ryusuke Konishi \<konishi.ryusuke@gmail.com\> for NILFS2, based on the umount program included in the util-linux package.

## AVAILABILITY

**umount.nilfs2** is part of the nilfs-utils package and is available from https://nilfs.sourceforge.io.

## SEE ALSO

[**nilfs**(8)](/nilfs/8.md), [**umount**(8)](/umount/8.md), [**mount.nilfs2**(8)](/mount.nilfs2/8.md), [**nilfs\_cleanerd**(8)](/nilfs_cleanerd/8.md).