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UMOUNT(8)               FreeBSD System Manager's Manual              UMOUNT(8)

NAME
     umount - unmount file systems

SYNOPSIS
     umount [-fv] special | node | fsid
     umount -a | -A [-F fstab] [-fv] [-h host] [-t type]

DESCRIPTION
     The umount utility calls the unmount(2) system call to remove a file
     system from the file system tree.  The file system can be specified by
     its special device or remote node (rhost:path), the path to the mount
     point node or by the file system ID fsid as reported by ``mount -v''.

     The options are as follows:

     -a      All the file systems described in fstab(5) are unmounted.

     -A      All the currently mounted file systems except the root are
             unmounted.

     -F fstab
             Specify the fstab file to use.

     -f      The file system is forcibly unmounted.  Active special devices
             continue to work, but all other files return errors if further
             accesses are attempted.  The root file system cannot be forcibly
             unmounted.

     -h host
             Only file systems mounted from the specified host will be
             unmounted.  This option implies the -A option and, unless
             otherwise specified with the -t option, will only unmount NFS
             file systems.

     -t type
             Is used to indicate the actions should only be taken on file
             systems of the specified type.  More than one type may be
             specified in a comma separated list.  The list of file system
             types can be prefixed with ``no'' to specify the file system
             types for which action should not be taken.  For example, the
             umount command:

                   umount -a -t nfs,nullfs

             unmounts all file systems of the type NFS and NULLFS that are
             listed in the fstab(5) file.

     -v      Verbose, additional information is printed out as each file
             system is unmounted.

ENVIRONMENT
     PATH_FSTAB      If the environment variable PATH_FSTAB is set, all
                     operations are performed against the specified file.
                     PATH_FSTAB will not be honored if the process environment
                     or memory address space is considered ``tainted''.  (See
                     issetugid(2) for more information.)

FILES
     /etc/fstab  file system table

SEE ALSO
     unmount(2), fstab(5), mount(8)

HISTORY
     A umount utility appeared in Version 6 AT&T UNIX.

FreeBSD 11.0-PRERELEASE          July 18, 2003         FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | FILES | SEE ALSO | HISTORY

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