Mac OS X / Darwin man pages : umount (8)
umount (8)
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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
unmounted.
- -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 is 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,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.
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