Setting up a new project or starting work on a project which is new to you? Read on to discover the quick and pain-free way of enabling password-less ssh login.
Step-by-step guide
Run this command in your terminal to have your default identity public key copied across to the server of choice.
ssh-copy-id user@hostname.example.com
Now try
ssh user@hostname.example.com
Success.
You can read more on the topic at https://askubuntu.com/questions/4830/easiest-way-to-copy-ssh-keys-to-another-machine.