On the client:

user@client:~$ ssh-keygen -t rsa -b 4096 -C "user@client"
user@client:~$ ssh-copy-id -i path/to/auth/file/user_rsa.pub user@server

1 2	user@client:~$ ssh-keygen -t rsa -b 4096 -C "user@client" user@client:~$ ssh-copy-id -i path/to/auth/file/user_rsa.pub user@server

On the server:

user@server:~$ sudo nano /etc/ssh/sshd_config

1	user@server:~$ sudo nano /etc/ssh/sshd_config

add/ change following:



	RSAAuthentication yes

	PubkeyAuthentication yes

	ChallengeResponseAuthentication no

	PasswordAuthentication no

        PermitRootLogin no

user@server:~$ sudo service ssh restart

1	user@server:~$ sudo service ssh restart