umount

See also: mount, Mount, How to share data with an instance.

The umount command without any options unmounts all previously defined mappings of local directories from the host to an instance.

You can also unmount only a specific mount if you specify the desired path.

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The full multipass help umount output explains the available options:

Usage: multipass umount [options] <mount> [<mount> ...]
Unmount a directory from an instance.

Options:
  -h, --help     Displays help on commandline options
  -v, --verbose  Increase logging verbosity. Repeat the 'v' in the short option
                 for more detail. Maximum verbosity is obtained with 4 (or more)
                 v's, i.e. -vvvv.

Arguments:
  mount          Mount points, in <name>[:<path>] format, where <name> are
                 instance names, and optional <path> are mount points. If
                 omitted, all mounts will be removed from the named instances.