[SLUG] fstab gone

["Rob B" <rbyrnes@xxxxxxxxxxxxxx>]

Somehow, I have managed to wipe out my /etc/fstab file.

I have managed to mount / but I an unable to correct /etc/fstab, since I
either appear unable to login as root, or the volume is mounted read-only.

What to do from here?  I have tried dropping to single user and editing
/etc/fstab there, but I still can't write to the file.

Cheers,
Rob