If you have a box of floppies that say they are 2.0MB this means they are unformated. To get them working in linux you need to use fdformat to Low-level format the floppy disk. The command for that is
fdformat /dev/fd0H1440
or possibly
fdformat /dev/fd0
The you can put a file system on them. If you wanted to put a fat filesystem on it for M$ windows you could use this command
mkfs.vfat /dev/fd0H144
or try
mkfs.vfat /dev/fd0
