copying public key does not work for ssh code example
Example 1: copy ssh key to remote server
ssh-copy-id -i ~/.ssh/mykey.pub user@host
Example 2: how to copy ssh key
ssh-copy-id -i ~/.ssh/mykey user@host
ssh-copy-id -i ~/.ssh/mykey.pub user@host
ssh-copy-id -i ~/.ssh/mykey user@host