The Admininterface module is a legacy module that holds all Magnolia 4.5 module classes that will still be required until the underlying modules are ported to Magnolia 5.0. The underlying modules are admininterface, gui and fckeditor. This guarantees backward compatibility of existing modules with Magnolia 5.0. The modules are deprecated. Port your existing modules to Magnolia 5.0 apps.
The Admininterface module does not contain any commands. All command functionality has been moved to appropriate Magnolia 5.0 modules.
The Admincentral module is bundled with Magnolia and typically already installed. You can download it from Nexus repository.
Admncentral is a Community Edition module. It is typically already installed. Launch the Configuration app and go to
/modules/ui-admincentral to check.