For most who come from a system like WordPress they will be used to having to add plugins to manage links, but within Ghost the power is already there through use of the redirects.yaml file contained within the Lab section.
Basically this file is going to control how specific redirects work within your Ghost site, when you 401 redirect you would also utilize this file. Becoming comfortable with this can allow you to make specific 301 redirects to get "pretty" urls for affiliate links.