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  <konishi.ryusuke@lab.ntt.co.jp>  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://nilfs.sourceforge.net.

SEE ALSO

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