Articles

XMLStarlet: a Unix toolkit for XML

XML is everywhere. A quick Google search shows more than a 100 Million articles about the subject. The XML proponents gush about its ability to provide structure and yet remain human readable. The XML critics are quick to mention that XML is so verbose that being human readable does not necessarily make it human comprehensible. Both sides are correct. Yet, despite the ongoing arguments, XML is already integrated into many software products and the rate of adoption is still on the rise. And that means that you need to learn tools and techniques that will allow you to use XML effectively.

The fine art of computer programming

The free software and open source communities are changing what it means to write code. Specifically, they are extending its audience from a few fellow employees to, theoretically, anyone in the world who wants to read it. Code isn’t just for computers and colleagues anymore and, gradually, we are seeing the beginnings of a body of literary critics and an appreciative readership for source code.

A chat project: back from the unknown

Some weeks ago I (Marco) was looking for new things to learn in Perl. I took a look at my library and reviewed the titles of the books I read less, and after some consideration found two topics: GUIs and threads. But since I hate the “hello world” kind of programs, I decided to start this exploration of the (for me) unknown parts of Perl with a somewhat meaningful application: a chat.

The chat project

Free software and digital rights management

In recent years, digital rights management technology (DRM) has become an important issue to free software users and developers. Free software users first experienced this issue when they discovered that they were unable to legally play their DVD discs on their Linux and BSD computers. In recent months, users carefully observed a technological arms race between Apple Computer and hackers working to circumvent the FairPlay system used to protect digital files purchased from Apple’s iTunes Music Store.

You needn’t eat spam (or worms)

Many who would cure us of spam look in the wrong place—technology—for the answer. These well-intentioned analysts rightly see this menace as resulting from a state machine that can be tweaked, but they should look to the I/O relationships of human behavior rather than communications protocols for the solution.

Interview with Robert Fanini @ GroundWork

The world of free software and the world venture capitalism don’t seem to have much in common. However, they are not as far from each other as it seems. Venture capitalists are getting more and more interested in free software. Robert agreed on answering a few questions to shed light on this issue.

TM: Please introduce yourself, tell our readers who you are and what you do.

Book review: High Performance Linux Clusters by Joseph D Sloan

Like distributed computing, clusters are a hot topic in the current computing climate. The reason is simple, with the explosion of Linux and cheaper components it’s actually become quite simple and inexpensive to put together a relatively high-powered cluster. Driving the cluster production is an increased need for computing power as applications are developed for different situations.

Book review: High Performance Linux Clusters by Joseph D Sloan

Like distributed computing, clusters are a hot topic in the current computing climate. The reason is simple, with the explosion of Linux and cheaper components it’s actually become quite simple and inexpensive to put together a relatively high-powered cluster. Driving the cluster production is an increased need for computing power as applications are developed for different situations.

Interview with Miguel De Icaza

Miguel is one of the founders of the GNOME project. His enthusiasm and leadership have been crucial for the development of GNOME. He also started the MONO project, which is one of the key technologies behind GNOME at the moment. Miguel kindly agreed on answering some of our questions about MONO.

TM: Miguel, first of all I’d like to ask you a personal question: are you enjoying yourself at the moment? How are the United States treating you?

Book review: Practical Subversion by Garrett Rooney

Version control is—or at least should be—a critical part of the development process. As Garrett Rooney explains right at the beginning of Practical Subversion (published by Apress), using version control can help you recover that file you accidentally deleted, or put your code base back into the position it was in, when it worked, before you introduced that latest bug.

Book review: Practical Subversion by Garrett Rooney

Version control is—or at least should be—a critical part of thedevelopment process. As Garrett Rooney explains right at the beginning of PracticalSubversion (published by Apress), using version control can help you recover that fileyou accidentally deleted, or put your code base back into the position it was in, whenit worked, before you introduced that latest bug.

Why I’m not a programmer today

My exposure to computers began at about the age of seven. This was probably mostly thanks to my grandfather being a member of the New Zealand Computing Society and my father always being keen on the latest technology. In the mid eighties, I got my first computer, a Sinclair ZX Spectrum; I recall transcribing code from a book and then recording it to tape so that I could play the games I had produced. I used to love it, and even in those early days it was clear that I had a predisposition to problem solving and an analytical mind.

Letters

Inaccuracies in “Promoting free software on non-free platforms”

Dear FSM,

Chris J. Karr’s article, “Promoting free software on non-free platforms” makes several mistakes which I feel deserve a response. I am one of those who believe that free software is fundamentally about human freedom, so the question of whether or not to port free software to non-free platforms depends only on whether doing so would promote human freedom or not.

On the “Creative Commons”: a critique of the commons without commonalty

On the face of it, the Creative Commons project appears to be a success. It has generated interest in the issue of intellectual property and the erosion of the “public domain”, and it has contributed to re-thinking the role of the “commons” in the “information age”. It has provided institutional, practical and legal support for individuals and groups wishing to experiment and communicate with culture more freely. A growing number of intellectual and artistic workers are now enrolling in the Creative Commons network and exercising the agency and freedom it has made available.

The future of computing: is free software ready?

The future is the state of things yet to come. One can only expect what may happen and never know what will happen. The future can only be predicted based on past experience. The predictions differ based on the forecaster and his experience, in-depth understanding and knowledge. The technological future is the technology of the future, the destiny of the technology of today.

The future can only be predicted based on past experience. The predictions differ based on the forecaster and his experience, in-depth understanding and knowledge

Free software 2.0

Free software (and open source) license models have become the most influential force in business IT to date. The first part of this article presents a brief history of free software, combined with the findings from an analysis of the attitudes and expectations, across several hundred large and medium-sized businesses, relating to free software. The second part of this article presents Delphi Group’s vision for the next wave of commercial free software, where demand is driven not by cost alone, but foremost by quality of service and increased agility.

Who’s behind that web site?

Let’s talk about phishing. Phishing is just like fishing, only your identity is the fish and the bait is an email that looks like it came from your bank, or eBay, or Paypal, or any other legitimate place. The goal is to get you to follow a link to a site owned by the phisher, and trick you into divulging some private information, such as your bank account number, pin, passwords, or social security number.

Book review: From Bash to Z Shell by Oliver Kiddle, Jerry Peek and Peter Stephenson

If you use a free software operating system or environment, chances are one of your key interfaces will be through some kind of shell. Most people assume the bulk of the power of shells comes from the commands available within them, but some shells are actually powerful in their own right. Many of the more recent releases being more like a command line programming environment than a command line interface. “From Bash to Z Shell” published by Apress, provides a guide to using various aspects of the shell.

Book review: From Bash to Z Shell by Oliver Kiddle, Jerry Peek and Peter Stephenson

If you use a free software operating system or environment, chances are one of your key interfaces will be through some kind of shell. Most people assume the bulk of the power of shells comes from the commands available within them, but some shells are actually powerful in their own right. Many of the more recent releases being more like a command line programming environment than a command line interface. “From Bash to Z Shell” published by Apress, provides a guide to using various aspects of the shell.

Linux-VServer

Everyone is eager to virtualize their working environment to take advantage of the abstraction layer it provides. Some may require resource isolation for enhanced security, others may need development environments for testing and debugging. Whatever your needs are, virtualization will save you resources through utilizing them more efficiently. This is done by exploiting synergies built on proven technologies, improving availability and reducing downtime, adding scalability through duplication and gaining a certain degree of hardware independence.

Gains from virtualization

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