umount man page on OpenDarwin

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

     umount — unmount filesystems

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

     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

     -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

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

     -t type
	     Is used to indicate the actions should only be taken on filesys‐
	     tems 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.

     /etc/fstab	 filesystem table

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

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

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

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