You should be able to get back with
Code: Select all
apt --reinstall install raspberrypi-bootloader raspberrypi-kernel
Now when I try, the first of those links gives me an "Authorisation Required" page and the second link gives a "Not Found". I clicked on the link in your first post earlier.
Look again at the "System Connection Method" pictures. The keyboard is plugged into the "Input Tool", which is then plugged into the PC via a Keyboard cable.