SSH To My Additional Non root user - Please help...

Hi all,

I am new to setting up a vps and would be grateful if someone could advise me on the following please:

I have read the setting up a vps beginners tutorial and I have understood how to log in to root via ssh keys. I have added ssh key in digital ocean portal and that all seemed to work fine.

I can log in via putty to root without any password

My problem is when adding a new user:

I can add the user fine, but adding ssh keys to the new sudo user is were iam stuck.

1. How do I do this? Step by step would be helpful? 2.Can I use putty to log in to this new user or do i still need to log in as root and then login as new user? 3.Can I create a new private and public key in puttygen? 4.do i use the same ssh key that I use for root?

Thanks in advance

Colin