To configure password-less login to a remote machine first, generate an SSH authentication key file on the local machine by using:
ssh-keygen -t rsa
Just press "enter" on all the questions to go with the defaults. Then, use:
Alternativley, you could use:
cat .ssh/id_rsa.pub | ssh firstname.lastname@example.org 'cat >> .ssh/authorized_keys'
Enter your password to confirm.
Make sure you check permissions on these directories:
chmod 700 ~/.ssh
chmod 640 ~/.ssh/authorized_keys
You should be able to log in without a password!