There is no /dev/fd0, but there is a /dev/fd which contains links named 0,1,2,255 which all point to /dev/console.
The dying machine does not have a CD-ROM drive, just a floppy. Would I be able to boot it from a Linux floppy and then access the hard drive from there (and then copy the file I need to the floppy)??
EDIT: I think I will see if I can scrounge up an IDE CD-ROM drive and install it temporarily so I can rescue the file with the Damn Small LInux LiveCD or System Rescue CD. Thanks for your help bthylafh UPDATE:
I found a CD-ROM and booted off a System Rescue CD. That allowed me to mount both the floppy and the dying hard drive, and copy what I needed.