2.11BSD#431 - /usr/man/cat8/umount.0

UMOUNT(8)	    UNIX Programmer'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 special 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 forci-
	       bly 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 exam-
	       ple 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)


Printed 11/24/99	January 16, 1996			1


UMOUNT(8)	    UNIX Programmer's Manual		UMOUNT(8)


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


Printed 11/24/99	January 16, 1996			2