It is really useful to use a SSH connection through public key instead of having to type the password each time (especially if you are using a very complex password).

Create a .ssh folder on your server

First of all, server side, you need to create an .ssh folder in your home dir. This is where you will keep your public keys.

# server side
$> mkdir ~/.ssh

Copy your ssh key on the server

Then, you need to copy your public RSA key on the server. Remember that this public key belongs to a machine. If you plan on connecting to your server through several computers, you will need to reproduce this step for each of them.

# client side
$> cat ~/.ssh/ | ssh 'cat - >> ~/.ssh/authorized_keys'

Update rights for user to use your public key

Change the permissions of the authorized_keys:

# server side
$> sudo chmod 600 ~/.ssh/authorized_keys && chmod 700 ~/.ssh/