TOPIC: How to add code to Header.php in a child theme

I'm creating a child theme for the first time and I had a few questions regarding code added to header.

In a non child theme there is certain code I add to my header.php file such as google analytics, google webmaster tools, buy sell ads, Facebook open graph, etc....

How do you do this in a child theme? Do you create a header.php file in your child theme? If so how is this done? Is it the same as the @import as I used on the css?

Thanks.

Are you doing these changes on the legacy hosting, or on the new Wordpress hosting? The method for this would be different for both.