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In three relatively simple steps, you can create a virtual server on the Linux® KVM hypervisor host using full virtualization. The Kernel-based Virtual Machine (KVM) is free, open source virtualization software for Linux that is based on hardware virtualization extensions (Intel VT-X and AMD-V) and a modified version of QEMU.

Brief explanation about some common Linux/UNIX admin commands

Processors have evolved to improve performance for virtualized environments, but what about I/O aspects? Discover one such I/O performance enhancement called device (or PCI) passthrough. This innovation improves performance of PCI devices using hardware support from Intel (VT-d) or AMD (IOMMU).

Part 1 introduces the components and concepts you'll need to tune your system for power efficiency. Part 2 compares the five in-kernel governors: performance, powersave, userspace, ondemand, and conservative. Part 3 show you what results you can achieve by power tuning your system.

Database security is the single biggest concern with today's Web-based applications. Without control, you risk exposing sensitive information about your company or, worse yet, your valuable customers. In this article, learn about security measures you can take to protect your PostgreSQL database. Be sure to download the sample code listings used in this article.

Modern operating system kernels provide the means for introspection, the ability to peer dynamically within the kernel to understand its behaviors. With this knowledge, you can tune or modify the kernel to avoid failure conditions. Discover an open source infrastructure called SystemTap that provides this dynamic introspection for the Linux® kernel.

Are you broadening your skills as a Linux systems administrator into various flavors of UNIX? Get a rundown of the differences and similarities between Red Hat Enterprise Linux and AIX so that you can perform day-to-day activities with ease.

Virtual appliance fundamentally changes the way software is delivered, configured, and managed. But the power behind virtual appliances lies in the ability to freely share them among different hypervisors. Discover a standard solution for virtual appliance interoperability called the Open Virtualization Format.

Linux continues to innovate in the area of file systems. It supports the largest variety of file systems of any operating system. It also provides cutting-edge file system technology. Two new file systems that are making their way into Linux include the NiLFS(2) log-structured file system and the exofs object-based storage system. Discover the purpose behind these two new file systems and the advantages that they bring.

The IBM Developer Kit for Linux, Java 2 Technology Edition is a development kit and runtime environment that contains IBM's just-in-time compiler, enhanced with a unique Mixed Mode Interpreter and a re-engineered Java 2 virtual machine.

Processors have evolved to improve performance for virtualized environments, but what about I/O aspects? Discover one such I/O performance enhancement called device (or PCI) passthrough. This innovation improves performance of PCI devices using hardware support from Intel (VT-d) or AMD (IOMMU).

Pipe Viewer is one of those little-known gems that once you find it, you can't recall how you lived without it. Find oodles of uses for it in your automation scripts. You can now insert a probe to give you real-time feedback of whats happening in your pipes.

If you think streams and pipes make a Linux expert sound like a plumber, here's your chance to learn about them and how to redirect and split them. This article grounds you in the basic Linux techniques for redirecting standard IO streams.

This article grounds you in the basic Linux commands for manipulating files and directories. This article also helps you prepare for Objective 103.2 in Topic 103 of the Linux Professional Institute's Junior Level Administration (LPIC-1) exam 101.

Learn about the virtualization capabilities of both HP-UX and AIX. The intent of this article is to educate you and also to help you make informed decisions as to which platform works best for you, from a feature and functionality standpoint and for your long-term strategic goals.

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