(wherever it says url.com, use your server's domain or IP)
Login to new server as root, then add a deploy user
sudo useradd --create-home -s /bin/bash deploy
sudo adduser deploy sudo
sudo adduser deploy admin
sudo passwd deploy
And Update the new password
Now login as that user
Make directory .ssh on the remote server and log out
mkdir .ssh
exit
Push your ssh key to the authorized_keys file on the remote server
scp ~/.ssh/id_rsa.pub [email protected]:~/.ssh/authorized_keys