By default Ghost does not create Admin user during the installation process. In order to access your Ghost Dashboard you will need to create your Ghost Admin user first. This can be done right after your installation process via your browser.
To access your Ghost registration page simply access your Ghost installation via your browser using the following URL:
Please remember to change 'example.com' with your actual domain name or IP address on which your Ghost installation can be accessed.
This will redirect you to the Ghost Sign up page at http://example.com/ghost/signup/
On the Sign Up page, please input your name, email address and desired password. Be advised that your password should be at least 8 symbols.
When you are ready hit the Sign Up button and you will be directed to your Ghost Admin Dashboard.