/usr/sbin/grub-floppy is in grub 0.97-29ubuntu66.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #!/bin/bash -e
cat << EOF
This program is broken, unsupported upstream, and has been deprecated in favour
of grub-mkrescue (grub-pc package).
EOF
exit 0
|