Originally Posted by dionoea
They're usually put in ~/.ssh/authorized_keys server side. Google "ssh authorized_keys" for more information. I'm not sure that it'll work on the kindle as I haven't tried it yet but I don't see why it shouldn't (unless the ssh binary was compiled without key support)
I spent more time than I should have trying this out every way 'til Sunday. No dice. First of all /root is in a tmp folder (/var/tmp/root) so anything you put there is volatile. I created /root on / and put /.ssh/authorized_keys there but sshfs didn't try to use it.
sftp doesn't work because it's not installed and the hack to put it in /usr/libexec won't work because there's no /usr/libexec directory on the K4.