# 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

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