SSH Connection by RSA, Disable Password Login

---

• 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
  

• On the server:

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

  add/ change the following:

  RSAAuthentication yes
  PubkeyAuthentication yes
  ChallengeResponseAuthentication no
  PasswordAuthentication no
  PermitRootLogin no
  

• .. Finally restart the server:

  user@server:~$ sudo service ssh restart