The first thing to do is copy your SSH public key from your control machine to the target machine. A full public key infrastructure tutorial is outside the scope of this book, but here is a quick walkthrough on the control node:
$ ssh-keygen -t rsa <<<< generates public-private key pair on the host machine if you have not done so already$ cat ~/.ssh/id_rsa.pub <<<< copy the content of the output and paste it to the ~/.ssh/authorized_keys file on the target host
You can read more about PKI at https://en.wikipedia.org/wiki/Public_key_infrastructure.
Because we are using key-based authentication, we can turn off password-based authentication on the remote node and be more secure. You will now be able to ssh from ...
