== client ==

ssh-keygen -b 4096 -t rsa
scp ~/.ssh/id_rsa.pub <account>@<server>:~/<client>.pub

== server (be sure to use the right user account) ==

cat ~/<client>.pub >> ~/.ssh/authorized_keys

== login from client ==

ssh -i ~/.ssh/id_rsa <account>@<server>

== changes in sshd_config ==

ChallengeResponseAuthentication no
PasswordAuthentication no
UsePAM no
RSAAuthentication yes
PubkeyAuthentication yes