I managed to ssh between servers. I created and installed public keys for both machines so that I can ssh from both servers to each other (from server A to B and from server B to A).

I did discover that if using the ssh command at the command line I don't need to use the ${servername} brackets, etc. simply typing 'ssh servername' is the correct format.

I am not sure why the difference from the tutorial I used but it works.

Also, I managed to use 'scp' command but I could only place the key in the root .ssh directory of the remote server.

I am not sure which version of ssh I am using since I am not the administrator of this box. How do I find out?