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.

It didn't take the enterprising community of Asus Eee PC users long to come up with some great tweaking tools for this Linux-based ultra-low-cost laptop. Just a few weeks after the official launch of Eee PC, the first tweaking utilities started to appear on the EeeUser forums. Today, you can choose from a wide selection of tools that can help you to customize your tiny laptop and make your work on it more efficient.

The Postal project includes three programs aimed at benchmarking mail server performance. The main program, postal, sends email messages to a specified list of destination addresses at a specified rate. Postal can let you see how fast your system can process incoming email and thus can help you measure improvements to your mail server when you are making software and hardware changes. For example, you can use postal to tell you whether switching to a different IMAP server will allow you to deliver more messages per second on the same hardware.

OpenDomain.org is an organization that offers to provide free use of certain domain names to worthwhile open source projects. Ric Johnson, the leader of OpenDomain.org and the owner of dozens of domain names, says he has spent thousands of dollars registering those domains in order to prevent "squatters and phishers" from snapping them up. He's keeping them safe so you can have a chance to use them. However, to some people, based on Johnson's past practices, it's not clear how OpenDomain.org differs from other organizations that buy up domain names in the hopes of future gains.

The reasons for the user revolt against KDE 4, which we reported on yesterday, are still being sorted out. They appear to be a complex mixture that includes the assumptions that KDE used in its planning, the rush by distributions to include a release that was not ready for general use, and sensationalism in free software blogs and journalism. One reason that has yet to be discussed is one of the potentially most significant -- the apparent shift in the FOSS user base. Judging from the quickness and thoroughness with which KDE 4 was rejected, the audience for free software seems to have shifted from a small group of knowledgeable users that treasures innovation to a larger one that values convention and familiarity and is actively suspicious of change.

There's no dearth of Linux distributions for desktop users or even for running high availability servers. But if you are a do-it-yourself computer user, your choice of Linux distros is fairly limited. You can build Linux from scratch with Linux from Scratch or compile your own set of packages with Gentoo. But if you want a distro that teaches you the basics of Linux as you set it up; is well documented, lightweight, and zippy; and has a dependency-resolving packaging system, you need Arch Linux.

The Ramlog project lets you keep your system logs in RAM while your machine is running and copies them to disk when you shut down. If you are running a laptop or mobile device with syslog enabled, Ramlog might help you increase your battery life or the life of the flash drive on your mobile device. As a side effect of using Ramlog, you will be less likely to be caught out by a daemon that suddenly starts sending a message to syslog every 30 seconds and saps your battery keeping the hard disk spinning.

An enterprising group has taken on a radical approach in attracting users to Linux: switch a whole town! Dubbed "Lindependence 2008" (a.k.a. LIN08), this event strives to switch citizens in Felton, Calif., for at least a week from Microsoft Windows to Linux. The initiative, loosely led by Ken Starks in Austin, Texas, and Larry Cafiero in Felton, has taken the idea of introducing normal computer users to Linux to screaming heights. By July 28, those in Felton who decide to take the plunge will go Microsoft-free for a week or more.

When KDE 4.0 was released in January, it was supposed to be the foundation for a new era of desktop development. But as 4.x versions began finding their way into distributions, negative reactions began to obscure other ones. With the upcoming 4.1 release due at the end of this month, it's hard to avoid wondering: what happened?

Myah OS is a desktop-oriented distribution built from the ground up around a custom package manager. When things go right, it has the potential to be an easy to use, simplistic deskop operating system. As you will see, however, not everything always goes right.

Want to get an idea of what speed advantage adding an expensive hardware RAID card to your new server is likely to give
you? You can benchmark the performance difference between running a RAID using the Linux kernel software RAID and a hardware RAID card. My own tests of the two alternatives yielded some interesting results.

The stage is set for the biggest annual free and open source software community awards -- and you can help determine the winners.

Concerned about the increasing popularity of Web applications, Marco Barulli of the Clipperz project has written one of the first detailed suggestions about how free and open source software (FOSS) should respond to the trend. Although neither Barulli nor Clipperz is well-known, his ideas are being listened to by such figures as Richard M. Stallman of the Free Software Foundation and Fabrizio Capobianco, the CEO of Funambol and a long-time advocate of FOSS in Web applications.

Ampache is a LAMP application that gives you a Web interface to your music collection, allowing you to search, rate, and play your music over the network. It even offers transcoding support to allow clients to play back lossless-encoded FLAC files from the server and stream them to clients as MP3 audio files.