scp /root/.ssh/id_rsa.pub giuse@ebook:/home/giuse/.ssh/authoryzed_keys

chmod 600 /home/giuse/.ssh/authoryzed_keys

poi in /etc/ssh/sshd_config
decommenta

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile %h/.ssh/authorized_keys

riavvia sshd