umount(8) [bsd man page]

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

NAME

       umount - unmount file systems

SYNOPSIS

       umount [ -fv ] special | node
       umount -a [ -fv ] [ -t ufs | external_type ]

DESCRIPTION

       The  umount command calls the umount(2) system call to remove a special device from the file system tree at the point node.  If either spe-
       cial or node are not provided, the appropriate information is taken from the fstab(5) file.

       The options are as follows:

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

       -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.  This is not currently implemented in 2.11BSD.

       -t ufs | external 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,mfs

		 umounts all filesystems of the type NFS and MFS.

		 NOTE: Only UFS is supported by 2.11BSD.  The example is for illustrative purposes only.

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

FILES

       /etc/fstab     file system table

SEE ALSO

       umount(2), fstab(5), mount(8)

HISTORY

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

4.4 Berkeley Distribution					 January 16, 1996							 UMOUNT(8)

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 list of filesystems provided by
     getfsent(3).

     The options are as follows:

     -a      All the filesystems described via getfsent(3) 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 implies the -A option and, unless otherwise speci-
	     fied with the -t option, will only unmount NFS filesystems.

     -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 currently-mounted filesystems of the type NFS and HFS.  (The -a option only unmounts entries in the /etc/fstab list.)

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

NOTES

     Due to the complex and interwoven nature of Mac OS X, umount may fail often.  It is recommended that diskutil(1) (as in, ``diskutil unmount
     /mnt'') be used instead.

SEE ALSO

     unmount(2), getfsent(3), mount(8), diskutil(1)

HISTORY

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

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