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64-bit computing is as prevalent today as multicore computing. Almost any new processor from Intel or AMD has the AMD long mode extensions, allowing the processor to use 64-bit registers. While 32-bit processors can address 4 gigabytes of RAM, a 64-bit processor can address 16 exabytes, or almost 17.2 billion gigabytes, of RAM. Most 64-bit-capable computers aren't making use of these capabilities, but instead are put to work running 32-bit operating systems, usually because of a lack of applications for 64-bit operating systems, since applications must be recompiled and in some cases rewritten for 64-bit operation. It is possible, however, to run 32-bit Linux binaries natively under 64-bit Linux kernels.

If you've ever used Microsoft Access or Excel, you have likely used a product that Mike Gunderloy had a hand in developing. The irony is that Gunderloy himself doesn't use those products anymore. He's given up Microsoft for open source -- and he's not going back.

Jon Travis, principal engineer for Hyperic, explains the company's new CloudStatus utility in this video interview. CloudStatus is free, it's open source, and you can access it through your Web browser. Right now it works only with Amazon's cloud computing services -- which currently dominates this market niche -- but Hyperic has plans to expand the service to other up-and-coming cloud computing providers.

Network Security Toolkit is one of many live CD Linux distributions focusing on network monitoring, analysis, and security. NST was designed to give network security administrators easy access to a comprehensive set of open source network applications, many of which are among the top 100 security tools recommended by insecure.org.

In this context, a one-liner is a set of commands normally joined through a pipe (|). When joined by a pipe, the command on the left passes its output to the command on the right. Simple or complex, you can get useful results from a single line at the bash command prompt.

The first two days of O'Reilly's Open Source Convention (OSCON) are dominated by technical tutorials, but there are sessions that buck the trend. Monday's most interesting event was Participate 08, a panel discussion sponsored by Microsoft. Panelists debated the meaning of the buzzword "openness" as it applies to source code, services, data, and business models.

Books, CDs, flashcards, classes -- there are a lot of tools to help you learn a foreign language. If you spend much of your time near a computer, software may be one of the better options. Ian McIntosh's Amigo is a friendly language utility for the Linux user, notable for how well it integrates into the desktop.

Life would be a lot easier if we could live in a Linux-only world and if applications never required data from other sources. However, the need to get data from Windows, MS-DOS, or old Macintosh systems is all too common. This kind of import process requires some conversions to solve file format differences; otherwise, it would be impossible to share data, or file contents would be imported incorrectly. The easiest way to transfer data between systems is by using plain text files or common formats like comma-separated value (CSV) files. However, converting such files from Windows or Mac OS results in formatting differences for the newline characters and character encoding. This article explains why we have these problems and shows ways to solve them.

ZK is an AJAX toolkit designed to make creating user interfaces that run in a Web browser as simple as creating event-driven interfaces for desktop applications. The interfaces created with ZK use an XML markup language to define the user interface and Java code to implement the Web application's functionality. ZK includes support for data-bound controls so that you do not have to worry about updating the user interface forms when you change your Java objects.

Where most computer science departments emphasize theory and mention free and open source software (FOSS) only indirectly, Seneca College in Toronto, Canada, offers a different approach: a hands-on introduction to the community in partnership with the Mozilla and Fedora projects. Now in its third year, the program is expanding rapidly and receiving attention from other academic institutions that hope to imitate it.

These days there are plenty of ways to back up your computer files. The options are easy when you're dealing with one computer -- just back up your files to an external hard drive and forget about it -- but when several machines are involved, each with a different operating system, things can get complicated. If you frequently work on more than one computer, having access to your synchronized files no matter where you are can also be useful. PowerFolder, a backup and file synchronizing service, helps you cover all your bases, no matter what platform or how many computers you're using.

Glubble is a free proprietary Firefox add-on from Glaxstar that limits the activity your child can perform online by blocking access to Web sites and filtering Google search results. For parents, a tool like Glubble can seem like the perfect answer to the problem of protecting kids from the unsavory elements of the Internet. But as I discovered through my use of Glubble, the questions surrounding the idea of Internet filtering don't come with easy answers.

Nobody knows yet what the Anti-Counterfeiting Trade Agreement (ACTA) will consist of, but the few available indications are so ominous that the Free Software Foundation (FSF) has started a campaign to raise public awareness of the possibilities. According to Matt Lee, an FSF campaign manager, ACTA threatens to "create a culture of fear and suspicion," and, in the worst-case scenario, undermine and demonize free software.

Last weekend a friend was moaning about endless problems with Windows XP on his desktop PC. We installed Ubuntu 7.04 on it. The problems went away. That started me thinking about my own "daily driver" computer, a Dell Latitude that also runs Ubuntu 7.04, and it made me realize that I hadn't thought about my laptop or its operating system in many months. Linux -- especially Ubuntu -- has become so reliable and simple that for most end users it's simply not worth thinking about, any more than we think about tools like wrenches and screwdrivers. Does this mean desktop GNU/Linux has become so boring that it's not worth noticing?

Software installation, deployment, and configuration can be a headache and a time sink for systems administrators. To ease the process, JumpBox delivers preconfigured Web apps that run as virtual appliances on any machine, across platforms, irrespective of operating system.

Over time, organizations replicate, migrate, or add complexity within database systems, often times losing control of the quality of their data. When applications begin to fail because of invalid, corrupted, or out-of-date data, the free, GPL-licensed Talend Open Profiler can give data analysts, database administrators (DBA), and business users the ability to research data structures and improve data quality. Through the use of Open Profiler, users can be alerted to hidden inconsistencies and incompatibilities between data sources and target applications. Through data analysis, business users and technical analysts can communicate both data structure and content needs.

Even though SCO has suffered another legal defeat, the company looks like it has enough willpower, if not sense, to keep its legal losing streak going.

The XFS filesystem is known to give good performance when storing and accessing large files. The design of XFS is extent-based, meaning that the bytes that comprise a file's contents are stored in one or more contiguous regions called extents. Depending on your usage patterns, some of the files contained in an XFS filesystem can become fragmented. You can use the xfs_fsr utility to defragment these files, thus improving system performance when it accesses them.

Nathan Zale Dowlen objects to proprietary software, so when he opened his new law office, he outfitted it with Ubuntu Linux and open source software. Cost was the main factor in his decision at first, but he has since come to appreciate the security found in FOSS and the ease of use found with Ubuntu.

Remodeling? Like free software? If you answer "yes" to both questions, try taking Sweet Home 3D for a spin. The open source, cross-platform 3-D interior design application is simple to use and simple to learn. You don't create individual objects in Sweet Home 3D like you do in a modeling app like Blender; instead you focus on the layout and design of the rooms themselves.