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NAME    [Toc]    [Back]

     umount -- unmount file systems

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     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

     -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

     -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

     -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    [Toc]    [Back]

     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 considred ``tainted''.  (See issetugid(2) for more

FILES    [Toc]    [Back]

     /etc/fstab  file system table

SEE ALSO    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

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

FreeBSD 5.2.1			 July 18, 2003			 FreeBSD 5.2.1
[ Back ]
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