Enterprise Software for Linux?

Ben Mayer asks: "I work for a company that is looking to start using Linux on our servers along side of the Windows 2000 boxes that we already have. We have been looking at tools like HP OpenView and IBM Tivoli for package distribution and backups. They both support Windows and a variety of U*IX but not Linux. I have spent a couple of days searching but have not found any products that support Win 2k and Linux and are of enterprise quality. Is Linux lacking in this area?"