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

NAME
     umount -- unmount filesystems

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

DESCRIPTION
     The umount command calls the unmount(2) system call to remove a special device or the remote node
     (rhost:path) from the filesystem tree at the point node.  If either special or node are not provided,
     the appropriate information is taken from the fstab(5) file.

     The options are as follows:

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

     -A      All the currently mounted filesystems except the root are unmounted.

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

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

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

                   umount -a -t nfs,hfs

             umounts all filesystems of the type NFS and HFS.

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

FILES
     /etc/fstab  filesystem table

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

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

4th Berkeley Distribution         May 8, 1995        4th Berkeley Distribution