"Nothing exists in a vacuum, especially in the world of IT. While it might be nice to imagine a world where all systems run Linux, the truth of the matter is that Linux needs to co-exist with other operating systems to make headway in the business world--especially with Microsoft Windows, which is too deeply embedded in corporate infrastructures to be displaced anytime soon.
"To that end, Likewise (formerly Centeris) provides solutions to integrate Windows, Linux, UNIX, and Mac OS X. Specifically, Likewise Enterprise and Likewise Open provide integration with Microsoft’s Active Directory, giving organizations the option of single sign-on for applications and users..."
