I have the following setup:
4 WP installs under one domain
They are all under a specific sub directory within the same domain
All usernames and passwords are shared among the installs, so if I change it in one the change is reflected in the other installs.
To achieve the whole username and password sharing there are two ways and the easy way, the one I took, is installing the “Shared Users” plugin (https://www.kruse-net.dk/wordpress-plugins/shared-users/) and the difficult way involves changing some PHP code.
What I want to do now is find a way to make publishing or switching between the WP installs easily and even sharing some information among them which I’m finding quite hard to actually achieve.