# localhost
scp .ssh/id_rsa.pub juanito@servidor:/home/juanito/
echo "alias servidor='ssh juanito@servidor'" >> .bashrc
source .bashrc 

# servidor
mkdir .ssh
mv id_rsa.pub .ssh/authorized_keys
chmod 700 .ssh
chmod 600 .ssh/authorized_keys

http://juque.cl/u/49