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Hot Off the Press

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Version 5.6 of Citrix XenServer is a feature-stripped version of the virtualization product and is available free, in addition to the commercial Advanced, Enterprise, and Platinum editions.

Snakebyte

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Overcome the Global Interpreter Lock in Python and take advantage of run-time parallelism on multicore machines.

Hyperspace

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In the face of competition from VMware, Microsoft has polished its own Hyper-V virtualization solution and firmly integrated it into Server 2008.

The Present and Future Network

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Energy Saver

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Many applications interrupt the CPU when it tries to sleep. PowerTOP not only identifies these evildoers but also provides tips on how to get rid of them.

Bug Hunter

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We sat down with Dan Rosenberg, security consultant and kernel bug hunter, to talk about code auditing, kernel fuzzing, and getting started in the security business.

NodeZero Linux

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Disk World

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Windows 7 implements virtual hard disks as VHD containers that offer many advantages over physical drives. We take a closer look.

Goalkeeper

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The sshguard tool does more than just repel attacks; it monitors login attempts and blocks future access.

Key Ring

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YubiKey promises hardware-based two-factor authentication if the application or library supports it. A WordPress plugin thus safeguards your blog.

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