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umount.nilfs2(8)

nilfs-utils version 2.2
Apr 2014

nilfs-tools

Continuous Snapshotting Log-structured Filesystem

nilfs-utils

A log-structured file system supporting continuous snapshotting (userspace utils)

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 shutdown the garbage collector nilfs_cleanerd(8) before detaching the file system. Usually it should be invoked through umount(8).

OPTIONS

See umount(8) 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).
-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).
-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) to free the loop device without the ‘loop=...’ option, is not supported.

AUTHOR

umount.nilfs2 is written by Ryusuke Konishi <> 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.
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