9.3 How can I make a custom boot floppy?

This task is greatly aided by the Debian package boot-floppies, normally found in the admin section of the Debian FTP archive. Shell scripts in this package produce boot floppies in the SYSLINUX format. These are MS-DOS formatted floppies whose master boot records have been altered so that they boot Linux directly (or whatever other operating system has been defined in the syslinux.cfg file on the floppy). Other scripts in this package produce emergency root disks and can even reproduce the base disks.

You will find more information about this in the /usr/share/doc/boot-floppies/README file after installing the boot-floppies package.