Originally Posted by WhiteDwarf72
... Does that mean that perhaps I can skip flashing diags and go stright to main kernel?
And once again how to start SSH shell?
If your K4 diags has SSH, you do not need to flash diags or the diags kernel.
And to repeat, use PuTTY for windows SSH, or built-in ssh command if running linux.
And you need to understand linux commands to do anything useful with SSH access to your kindle. Especially, do not do anything harmful while in there poking around "under the hood" with full root access...