Mtools is a free software collection of utilities to allow a Unix operating system to manipulate files on an MS-DOS file system, typically a floppy disk or floppy disk image.
The mtools are part of the GNU Project and are released under the GNU General Public License (GPL-3.0-or-later).
The following refers to mtools usage in floppy images. (Useful for virtual machines such as QEMU or VirtualBox.)
Copying a file to floppy image:
Copying a file from floppy image to the current directory:
Deleting all files in the disk image
The drive character <code>:</code> (colon) has a special meaning. It is used to access image files which are directly specified on the command line using the <code>-i</code> options.