The Year 2000 opened with a dud, security wise: despite the predictions of many, the world of computers didn't ground to a halt, and crackers didn't use widespread Y2K related failures as cover for their own attacks. But in the months since we have seen repeated security incidents, including the distributed denial-of-service attacks in February 2000, repeated Visual Basic worms that have disrupted thousands of corporations, and repeated instances of e-commerce firms that did not properly safeguard their customer's data. Although Linux is generally regarded as a secure operating system, you cannot allow your choice of operating system to be a substitute for ongoing vigillance. In this talk, Simson Garfinkel, co-author of Practical UNIX Security, looks at the current "best practices" recommendations of computer security organizations and sees how these apply to both Linux and multi-operating system environments.