SCO already filed for bankruptcy and now Darl McBride Testified:
Linux is a copy of UNIX, there is no difference
First, Linux is kernel and not operating system. Linux distribution includes Linux kernel, GNU utilities, compilers and installation / management software. This guys is lying and nothing else.
Microsoft is extending its management software to Linux and Unix by integrating some of the open source OpenPegasus project's code into System Center Operations Manager. You can use this software to manage your Linux / UNIX boxes:
Today Microsoft announced a few new beta products – two of which came from our team. The System Center Operations Manager 2007 Cross Platform Extensions, which enable customers to manage Unix/Linux systems from Operations Manager 2007, was delivered as a beta today.
=> Microsoft Uses Open Source To Extend Systems Management To Linux
M. Shuaib Khan has published a list of open-source cluster management systems.
Personally, I had used openMosix and Red Hat Cluster software (which is also based upon open source software funded by Red Hat).
From the article: In computing world, the term "cluster" refers to a group of independent computers combined through software and networking, which is often used to run highly compute-intensive jobs. With a cluster, you can build a high-speed supercomputer out of hundreds or even thousands of relatively low-speed systems. Cluster management software offers an easy-to-use interface for managing clusters, and automates the process of queuing jobs, matching the requirements of a job and the resources available to the cluster, and migrating jobs across the cluster:
Read this article it offers feature, cons and pros of each solution.