Unfortunately, there are two bugs contained in the Ubuntu version included on the Linux Magazine Issue #90 DVD Virtual Distro Sampler. For more information and suggested workaround, please visit the Issue 90 DVD page.
Internet intruders have many ingenious ways of escalating privileges and hiding their presence once they get inside your system. The best protection is to keep them out in the cold.
Many enterprises still rely heavily on mainframes, which makes it all the more difficult to get your hands on one and install Linux on it. The Hercules emulator gives you a full-fledged alternative.