Transfer your public key to 45.79.18.9 using the ssh-copy-id command code example
Example 1: copy ssh key to remote server
ssh-copy-id -i ~/.ssh/mykey.pub user@host
Example 2: copy ssh keys
pbcopy < ~/.ssh/id_rsa.pub
ssh-copy-id -i ~/.ssh/mykey.pub user@host
pbcopy < ~/.ssh/id_rsa.pub