When you encounter an error relating to this one:
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
Please install the following packages to help fix the issue "ssh-import-id"
Reload the SSH server then try again. For more modern linux systems running on Cinnamon in my case using LinuxMint I have to use the following syntax to get it right.
ssh-copy-id -p 35354 -i .ssh/id_rsa.pub user@some_ipV4_address