$ ssh-keygen -t rsa -C "admin@d7.debian.loc"
$ ssh-keygen -t dsa -C "admin@d7.debian.loc"
$ cat ~/.ssh/id_rsa.pub | ssh user@hostname "cat>> ~/.ssh/authorized_keys"
$ ssh user@hostname
$ sudo sed -i "s/^\#RSAAuthentication.*$/RSAAuthentication yes/g" /etc/ssh/sshd_config
$ sudo sed -i "s/^\#PubkeyAuthentication.*$/PubkeyAuthentication yes/g" /etc/ssh/sshd_config
$ sudo /etc/init.d/sshd restart
$ ssh-keygen \
-m PEM \
-t rsa \
-b 2048 \
-C "deployer" \
-f ~/.ssh/deploy_rsa_id
$ netstat -tnpa | grep 'ESTABLISHED.*sshd'
ssh -vvv -o PreferredAuthentications=publickey name@host -p port