Migrating sub domain

Hi i am developing a site in a sub domain of my main site and i want to swap them so that the sub domain becomes the main domain and the main domain becomes old.maindomain. My main site is currently in the root directory of my host and the sub domain is a folder under it, how will i be able to do that?

maindomain.com -> old.maindomain.com

new.maindomain.com -> maindomain.com

• This topic was modified 5 days, 16 hours ago by skamaz2020.