How To Add A New SSH Key To A Ubuntu Server

HOW TO ADD AN SSH KEY LIKE A DUMMY:

So if you have a client machine and you want to give them access to your server do this.

ssh-keygen

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/client/.ssh/id_rsa): /Users/client/.ssh/new_key

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /Users/client/.ssh/new_key.

Your public key has been saved in /Users/client/.ssh/new_key.pub.

This generates two files:

/Users/client/.ssh/new_key        (private)

/Users/client/.ssh/new_key.pub (public)

Now you must copy the public key to the server of interest. On the server after you have copied the local file you can append to the 

cat /home/john/new_key.pub >> /home/john/.ssh/authorized_keys

Now the user can login using their private key.

ssh -i /Users/client/.ssh/new_key john@myserver.com