"The world's largest technical support, software and hardware companies use Linux on a daily basis for a variety of tasks and solutions. This post gives you an overview of all the ways in which large companies use Linux. Most don't use Linux on the desktop but do use it in ways you might expect (and a few you might not expect) a company of that magnitude to use it. They've leveraged Linux for some of the most critical workloads and 100% uptime service levels. Welcome to the world of enterprise Linux.
"10. Intrusion Detection Systems - Linux provides the perfect network intrusion detection services platform because it's free, runs on just about any available hardware and is the favorite platform of open source developers. Applications such as Snort, the most widely deployed intrusion prevention and detection technology in the world, were built upon the free, open source ideal in mind."
