Getting started with Elgg Multisite. How to implement Elgg multisite.
By İşöğüçı
https://www.marcus-povey.co.uk/2012/03/08/getting-started-with-elgg-multisite/
Elgg multisite is a version of Elgg which lets you easily run multiple Elgg sites off a single install of the software, starting new Elgg sites at the click of a button.
Marcus Povey's article.