Add ssh key to existing droplet in digital ocean
<p>I have the droplet on the digital ocean. I have tried to add ssh key to existing droplet. But there they asked for root password and I don't have root password. I have tried to connect to the droplet through the <code>putty</code>. It is giving message : <code>Unable to use key "home/id_rsa" (OpenSSH SSH-2 private key)</code>. How to connect to droplet using ssh key? And What is the proper way to connect to the droplet? Is there any way to add ssh key to the existing droplet?</p>