OK, so I very stupidly deleted a file that I spent a couple of hours writing (of course, I wrote it via putty..on the server...with no local copies)
I'd like to try to undelete it...

I log in and issue

open /dev/sda2 - This gives me an error "Bad magic number in super-block while opening filesystem"

Can anyone help me out here? This file is very important and I don't have the time nor the patience to rewrite it.......I'm not sure what the error is supposed to mean..