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


NAME

     umount - unmount filesystems


SYNOPSIS

     umount [-dfv] special | node
     umount -a | -A [-F fstab] [-dfv] [-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 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
             unmounted.

     -d      If the filesystem was mounted from a vn(4) vnode disk, detach the
             underlying disk as well.

     -F fstab
             Specify the fstab file to use.

     -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 specified 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,mfs

             unmounts all filesystems of the type NFS and MFS that are listed
             in the fstab(5) file.

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


ENVIRONMENT

     PATH_FSTAB  If the environment variable PATH_FSTAB is set all operations
                 are performed against the specified file.


FILES

     /etc/fstab  filesystem table


SEE ALSO

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


HISTORY

     A umount command appeared in Version 1 AT&T UNIX.

DragonFly 6.5-DEVELOPMENT       March 10, 2024       DragonFly 6.5-DEVELOPMENT

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