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NAME

       umount.nilfs2 - unmount NILFS2 file systems

SYNOPSIS

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

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

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:

       -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  <ryusuke@osrg.net>  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
       http://www.nilfs.org.

SEE ALSO

       nilfs(8), umount(8), mount.nilfs2(8), nilfs_cleanerd(8).