Boot the Workbench system disk and try to find out what's going on. Unexpectedly, my Workbench disk defaults to a French keymap, so the first thing I have to do is type "setmap usa1" at a shell (with some difficulty). usa1 is also not the keymap I really want, but apparently is the only other available one. Punctuation all in the wrong places, but at least the letters work.
Workbench also can't read my image file. I don't just mean it thinks it's an invalid ILBM. It can't read it _at all_, even for purposes of copying it to NIL:. Linux has corrupted the disk's filesystem. (6/8)