There are several questions here on wordpress.SE that explain how you can change the author slug in the author permalink URL, e.g. from
But I do not want to change the author slug. I want to:
Change the whole author permalink to point to an external site
For example, I might have a blog at
http://my.blog.tld/, of which I am the only author, and I want my author name under my posts to link to
How can I implement this?
I would prefer to do this as a plugin, that is, without changing any other files, but if that is not possible I will edit whichever file is necessary.
I know that there is the Google+ Author Information in Search Results plugin, but this is a bit more complex than I know how to adapt, and out of the box it does not work with my latest WP installation.