Unmount filesystems. 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.
Syntax
umount [-fv] special | node
umount -a | -A [-fv] [-h host] [-t type]
Options
-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 oth-
erwise specified with the -t option, will only unmount NFS
filesystems.
-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.
FILES
/etc/fstab filesystem table
“Be nice to people on the way up, because you'll meet them on your way down” - Wilson Mizner
Related:
umount man page - Apple.com
hdiutil - manipulate disk images
mount - Mount a file system
fstab(5) -
