ssh-keygen -f ~/.ssh/id_rsa -q -P ""
cat ~/.ssh/id_rsa.pub
Copy and put that ssh key on destination server in (if don't exists, create it):
~/.ssh/authorized_keys
rsync -avz -e "ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null" --progress /var/www/claro/public/ root@107.170.127.55:/var/www/host/claro/public
source: https://www.digitalocean.com/community/tutorials/how-to-copy-files-with-rsync-over-ssh