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Alex Moskalyuk writes "Remember the Best Buy commercial where a puppet asks a woman for a laptop computer, and upon hearing that it's a 'wireless' laptop, starts imagining his life free of strings and limitations? That guy doesn't know it yet, but soon the harsh reality will kick in, ironically kicking him off the wireless network periodically if he uses Microsoft Windows Wireless Zero Configuration or if he wants to run Linux on a laptop with WiFi card that doesn't support Linux. This book, however, is not just about getting your Linux laptop onto the wireless network. Granted, WiFi plays a big role in today's business and personal networks, and three chapters are dedicated to exactly that purpose, but behind that wireless adjective we have a variety of technologies." Read on for the rest of Alex's review of Linux Unwired, from O'Reilly. Linux Unwired: A Complete Guide to Wireless Configuration author Roger Weeks, Edd Dumbill, Brian Jepson pages 300 publisher OReilly rating 8 reviewer Alex Moskalyuk ISBN 0596005830 summary Complete guide to wireless configuration on Linux

Infrared, Bluetooth, 802.11 (in current a, b and g offerings, 802.11i is also being discussed), wireless access points friendly to Linux, United States commercial cellular networks and GPS systems are all covered in a single title that surprisingly fits all of this information into 284 pages. All the chapters can be subdivided into two large parts - familiarizing yourself with the technology (the primer on GPS is pretty good) and running Linux on it (with code and shell command samples and lots of URLs).

Introduction

The authors start up with introduction to wireless, intended for Linux geeks who are not quite up to speed on radio technologies. The concepts of waves, spectrum and radio wave behavior are explained, so later the reader can explain what a retracted radio wave is. Then the first chapter moves on to explain antenna behavior, wireless infrastructure modes and some common problem, like a hidden node in ad-hoc infrastructure. The chapter is well-written, and you're not expected to have an advanced radio degree or ARRL membership to understand the terms.

WiFi cards

Chapters 2, 3 and 4 deal with connecting a Linux desktop or notebook to a wireless 802.11 network. The first issue is that of chipsets used in the wireless card, and even though enough research has been done already, authors discuss different quirks relevant to Intersil Prism, Lucent WavelLan/Orinoco, Aironet/Cisco, Symbol, Atmel, Atheros and Broadcom chipsets. We need to discuss chipsets instead of discussing the actual wireless cards, since some hardware may be shipped under the same brand name with different internals. "A good case in point: the D-Link DWL-650. This radio card initially shipped with a Prism II chipset and was very popular, because it worked on a Linux box. However, D-Link changed chipsets when it released the DWL-650 Version 2, choosing the ADMtek chipset. It is very difficult to tell from the packaging which version of the DWL-650 you are purchasing".

The chapters are done in traditional walk-through mode. They are not HOWTOs or compendia of reference information, available from the manufacturer's Web sites. The authors made an effort to ensure the reader is capable of starting up a wireless connection on Linux box, knowing nothing about it while learning important technology in the process. Certain wireless drivers need to be compiled into Linux kernel, so the task is not for the meek, but with detailed explanation, plenty of URLs and nice fonts and paragraph formatting O'Reilly Publishing uses to differentiate between the text, commands entered at the shell, and URLs, the book is easy to read.

Chapter 3 (available in PDF) teaches the reader how to connect to existing wireless network once the wireless card has been recognized by the system and proven functional. By the time the book hit the stores it was already a bit out of date, since the very first hotspot operator, Cometa Networks, shut down in May 2004. Chapter 4 discusses wireless security, touching WEP settings, a $20 Linuxant utility allowing the user to implement WiFi Protected Access, as well as authentication utilities wpa_supplicant and XSupplicant.

WiFi access points

The issue of WiFi access points is not trivial either, as many vendors out there will ship the product with a Windows app being the only way to set it up. However, for the access point setups that are Web-based, a browser in Linux will do the job. The most Linux-friendly access point include Linksys, Netgear, D-Link, Cisco, SMC, EnGenius, Belkin, US Robotics, Microsoft and ActionTec. Again, harsh reality kicked in between the time the book was written and went to press, and it's sad to see yet another Linux-friendly access point vendor quitting the market.

Not satisfied with commercial offerings out there? Chapter 6 takes the reader into the task of building your own access point. Don't forget that an access point doesn't need to be a compact portable - your old 486 with Linux on it and a wireless card connected to it might serve the purpose. Unfortunately, after all the hardware is bought and assembled, the final product might still cost you the quadruple (in case you go with smaller form-factor motherboards and CompactFlash cards for software storage), so consider this more as a geek project, not a viable solution. The authors use LinuxAP distribution for this task.

16 pages are dedicated to hacking Linksys WRT54G access point with Sveasoft, described as disruptive technology by Robert X. Cringely. The authors also take a brief look at Wifi-box and OpenWRT.

Other wireless technologies

Bluetooth, Infrared, cellular and GPS chapters follow the same chapter plan - first the basics of the technology and simple use case scenarios of what you might use it for, then the hardware needed to implement the wireless technology, available Linux software to do the jobs, accompanied with the list of shell commands to successfully talk to a wireless product, and after that typical applications of the working link.

The authors tested various wireless data plans in the United States, although this data, once again, is constantly changing as the operators buy one another and introduce new data plans. The winner of the quality and the fastest download tests, by the way, was a Motorola v120e phone on Verizon Wireless network. In upload speed tests a Merlin C201 PCMCIA card on Sprint PCS network won. T-Mobile also offers a PCMCIA card for its GPRS network, so the authors install and run it under Linux in Chapter 9.

The last chapter discusses using Linux computers with GPS devices and open-source GPSdrive project for reading GPS data.

The book

For those just venturing into the wireless world, the book would be useful. All the information provided on WiFi connectivity can perhaps be googled and found in various HOWTOs. With wireless operators, GPS systems and Infrared connection one would have to rely on enthusiast sites and newsgroups. Having such informative title that covers all of the technologies would be very useful to a Linux enthusiast.

With that, the book can be quite overwhelming, although it's probably not intended to be read from page 1 to the end. There's usually more than one correct way to do things in Linux, and for each successful project another competitor appears on SourceForge the next day. I like the authors' approach of dedicating most of the chapter space to one, leading, Linux package that seems to be dominant in the field, and then briefly mentioning the others. A notable omission is Intel's Centrino drivers for Linux, as the company is bound to become a leader in the chipset marketplace with 42% of notebooks shipped in 2003 running Centrino chipsets.

But overall the book proved to have a high informational and educational value, not only you follow the steps on setting up wireless technologies on Linux, but you also learn the internals of the technology and why certain things are done that way, but not another.

You can purchase Linux Unwired from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, carefully read the book review guidelines, then visit the submission page.

prostoalex writes "Folks at the Scriptometer conducted a practical survey of which scripting language is the best. While question like that is bound to generate flamewars between the usual Perl vs PHP, Python vs Perl, VBScript vs everything crowds, the Scriptometer survey is practical: if I have to write a script, I have to write it fast, it has to be small (less typing), it should allow me to either debug itself via a debugger or just verbose output mode. sh, Perl and Ruby won the competition, and with the difference of 1-2 points they were essentially tied for first place. Smalltalk, tcc, C# and Java are the last ones, with Java being completely unusable in scripting environment (part of that could be the fact that neither Java nor C# are scripting languages). See the 'Hello world' examples and the smallest code examples. Interesting that ICFP contests lately pronounced OCaml as the winner for rapid development."

cyberscribe writes "Project K++ just released its first alpha version today. The project aims to explore computer-generated abstract art using PHP and Ming. The name of the project is an homage to Wassily Kandinsky, father of abstract art. Caution: the Flash movies can be intensive on your graphics card. Other caution: hitting reload to see the next cool computer-generated abstract 'painting' can be highly addictive."

foolinator writes "Yahoo News is featuring an article highlighting TiVO alternatives. This includes MythTV (my favorite), Freevo, and even sites on how to start as a newbie. All of us who subscribe to the mailing lists be prepared to help out the newbies as Linux PVRs become more mainstream."

Titusdot Groan writes "Infoworld is reporting that Network Associates, makers of McAfee, have been granted a broad anti-spam patent. The patent covers "compound filters, paragraph hashing, and Bayes rules" and was filed in December of 2002. The patent appears to affect Spam Assassin, Spam Bayes and many other anti-spam products and services. As an aside Paul Graham's "A Plan for Spam" was published August 2002."

Martin Ecker writes "Following other entrants in the successful series of graphics and game programming-related "Gems" books, Randima Fernando of NVIDIA has recently released GPU Gems - Programming Techniques, Tips, and Tricks for Real-Time Graphics through Addison- Wesley. As the title indicates, GPU Gems contains a collection of tips and tricks for real-time graphics programming with graphics processing units (GPUs) that are found on modern graphics adapters." Read on for the rest of Ecker's review, and for a few more notes on the book. GPU Gems – Programming Techniques, Tips, and Tricks for Real-Time Graphics author Randima Fernando (Editor) pages 816 publisher Addison-Wesley Publishing rating 9 reviewer Martin Ecker ISBN 0321228324 summary An excellent book containing many "gems" for real-time shader developers.

The book is intended for an audience already familiar with programmable GPUs and high-level shading languages and is divided into six parts that concentrate on particular domains of graphics programming. Each part contains between five andd nine chapters, with the entire book containing a total of 42 chapters. Each chapter was written by a different renowned expert(s) from a gaming company, tool developer, film studio, or the academic community. About half of the contributors are from NVIDIA's Developer Technology group. The chapters focus on effects and techniques that help developers to get the most out of current programmable graphics hardware. With approximately twenty pages per chapter, the contributors are able to describe various effects and techniques in-depth, as well as delve into the required mathematics.

All the shaders in the book are written in the high-level shading languages Cg and HLSL. The demo programs on the CD-ROM that accompanies the book use both Direct3D and OpenGL as graphics API, depending on the authors' preferences. Even though the shaders are in Cg and HLSL, it should be fairly straightforward for OpenGL programmers who might prefer to use the recently released OpenGL Shading Language to port the shaders, as the syntax is very similar.

The first part of the book deals with natural effects and contains chapters on rendering realistic water surfaces, water caustics, flames, and grass. Two chapters look behind the scenes of NVIDIA's Dawn demo, which shows a dancing fairy with realistically lit skin. There is also a chapter on Perlin noise (improved version) and its implementation on GPUs that was written by Ken Perlin himself.

The second part of the book concentrates on lighting and shadows. There are chapters from people at Pixar Animation Studios that describe some of the lighting and shadow techniques used in their computer-generated movie productions, as well as a chapter on managing visibility for per-pixel lighting. In the shadow department, the two predominant ways of rendering shadows in real-time, shadow mapping and shadow volumes, are discussed with possible optimizations and improvements. The chapter by Simon Kozlov on methods to improve perspective shadow maps presents some especially interesting new material on the topic.

The third part of the book covers materials and contains chapters on subsurface scattering, ambient occlusion, image-based lighting, spatial BRDFs, and how to use them efficiently in real-time, while part four describes various techniques for image processing (being used more frequently in computer games), mostly in the form of post-processing filters. The chapters presented in this section deal with various depth-of-field techniques, a number of filtering techniques using shaders, and the real-time glow effect seen in many of the newer games (especially in Tron 2.0). Not surprisingly, one of the authors of this chapter is John O'Rorke from Monolith Productions, a developer of the game. Contributors from Industrial Light & Magic introduce the OpenEXR file format used for storing high-dynamic-range image files (see openexr.org).

Part five, titled "Perfomance and Practicalities," is a collection of chapters that deal more with software engineering aspects of developing software that uses shaders. In particular, there are chapters on optimizing performance and detecting bottlenecks, using occlusion queries efficiently, integrating shaders into applications and content creation packages (in particular Cinema4D), and how to develop shaders using NVIDIA's FX Composer tool. There is also an interesting chapter on converting shaders written in the RenderMan shading language, a language for offline rendering, to real-time shaders. The chapter uses a fur shader from the movie "Stuart Little" to demonstrate this conversion. With the large increase of GPU processing power, more shaders from the offline rendering world will enter the realm of real-time graphics and it will be useful to re-use already existing resources, such as RenderMan shaders.

The final part of the book deals with a topic that has recently received a lot of attention by graphics researchers - a topic called General Purpose GPU or GPGPU programming, i.e. using the GPU for other things than rendering triangles. This part comprises chapters on performing computations, in particular fluid dynamics, on the GPU, chapters on volume rendering, and a nice chapter on generating stereograms on the GPU. As a side note, there is a website that deals exclusively with news in the GPGPU community at gpgpu.org.

The book contains a many images that show the presented effects in action, and also plenty of diagrams and illustrations that explain more complicated techniques in detail. Unlike Randima Fernando's previously released book, The Cg Tutorial, which I have also reviewed in the past on Slashdot, the book and all of its illustrations and images are printed entirely in color. The large number and high quality of the illustrations is probably one of the best features of this book that makes even the more advanced effects easily comprehensible.

The book comes with a CD-ROM that contains sample applications for most of the chapters in the book. Some of these applications include the full source code, whereas others, such as NVIDIA's Dawn demo (also described in some of the book's chapters), are included as executables only. It must be noted that all applications run exclusively on Windows, even though some of the samples that are available in source code form and use OpenGL could probably be built to run on other operating systems as well. Furthermore, about half of the samples require what Fernando and Kilgard in The Cg Tutorial call a fourth-generation graphics card to run, in particular, an NVIDIA GeForceFX card. Note that most samples that require a GeforceFX will not run on comparable ATI hardware. This comes as no surprise since GPU Gems is predominantly an NVIDIA book. It should be noted, however, that the techniques, effects, and shaders presented in the book's text are generally applicable to programmable GPUs and are equally useful when working with graphics hardware from vendors other than NVIDIA.

This is a great book that every programmer involved in game development and/or real-time computer graphics should have on his/her shelf. For the game programmer it is critical to stay up-to-date with the latest and greatest effects available with modern GPUs in order to remain competitive when creating the gaming experience. For the graphics developer, it is interesting to see how the immense processing power of current graphics hardware can be exploited in graphics applications. This book offers insight on both of these topics and more, and I highly recommend it.

A few notes from reader Akalgonov: Reader akalgonov contributes a few more thoughts on the book:

"The sample programs and demos require shader support, Cg, OpenGL, or the latest version of DirectX to run. On the plus side, the majority of the companion topics included pre-compiled binaries (but not the runtime dynamic link libraries) or an AVI illustrating the subject in addition to the source code. While the CD contains over 600 MB of examples from the text, it provided only 23 of the 42 topics covered in the book. Since most of the articles provide an overview and references to a topic, additional material on the CD would have been beneficial.

I found the wide range of subjects quite interesting - and was refreshed that the topics actually seemed "ahead of the curve" in terms of hardware requirements. However in order to provide more subject depth, it seemed that the text could have been split into two volumes in order to expand the existing chapters with sufficient depth. As the material is just enough to get one started, the subject treatment may disappoint some readers seeking to apply the clever and unique techniques presented in the book directly or those hoping to use the book as an opportunity to learn some of the advanced features provided in a programming graphical processing unit."

Martin Ecker has been involved in real-time graphics programming for more than 9 years and works as a games developer for arcade games, and works on the open source project XEngine. You can purchase GPU Gems -- Programming Techniques, Tips, and Tricks for Real-Time Graphics from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

baxissimo asks: "I've played around with Python a bit, and as a scripting language I quite like it. So I sat down the other day to see if I could use it to make a modest OpenGL/GUI application on Windows. The short story is I gave up. I couldn't get the Python IDE I had to run--but that didn't stop me. At first I just shrugged my shoulders and said to myself 'Ah, who needs it? I've got emacs,' and then proceeded to waste a few hours trying to cobble together an app that would run before it dawned on me that Python without a decent IDE is definitely not easier to use than C++ with an IDE. So is anyone out there actually using Python to make serious apps? What tools are you using?" "I've heard the wxPython bindings are nice for the GUI bits, so I downloaded those, and pyOpenGL, and numPy, and PIL, etc. The only recommendation I really saw anywhere for an IDE was for boaConstructor, so I got that. Unfortunately it only spit out a useless error messages on startup and died. What I'd really like to start doing is creating C++/Python hybrids, but given that I was unable to successfully debug a pure Python app, I'm wondering what it's going to be like when my bugs might be in either language. How do people deal with this? What tools help you get the job done? If there's nothing free that works, are there any commercial IDE's worth the money?"

baxissimo asks: "I've played around with Python a bit, and as a scripting language I quite like it. So I sat down the other day to see if I could use it to make a modest OpenGL/GUI application on Windows. The short story is I gave up. I couldn't get the Python IDE I had to run--but that didn't stop me. At first I just shrugged my shoulders and said to myself 'Ah, who needs it? I've got emacs,' and then proceeded to waste a few hours trying to cobble together an app that would run before it dawned on me that Python without a decent IDE is definitely not easier to use than C++ with an IDE. So is anyone out there actually using Python to make serious apps? What tools are you using?" "I've heard the wxPython bindings are nice for the GUI bits, so I downloaded those, and pyOpenGL, and numPy, and PIL, etc. The only recommendation I really saw anywhere for an IDE was for boaConstructor, so I got that. Unfortunately it only spit out a useless error messages on startup and died. What I'd really like to start doing is creating C++/Python hybrids, but given that I was unable to successfully debug a pure Python app, I'm wondering what it's going to be like when my bugs might be in either language. How do people deal with this? What tools help you get the job done? If there's nothing free that works, are there any commercial IDE's worth the money?"

baxissimo asks: "I've played around with Python a bit, and as a scripting language I quite like it. So I sat down the other day to see if I could use it to make a modest OpenGL/GUI application on Windows. The short story is I gave up. I couldn't get the Python IDE I had to run--but that didn't stop me. At first I just shrugged my shoulders and said to myself 'Ah, who needs it? I've got emacs,' and then proceeded to waste a few hours trying to cobble together an app that would run before it dawned on me that Python without a decent IDE is definitely not easier to use than C++ with an IDE. So is anyone out there actually using Python to make serious apps? What tools are you using?" "I've heard the wxPython bindings are nice for the GUI bits, so I downloaded those, and pyOpenGL, and numPy, and PIL, etc. The only recommendation I really saw anywhere for an IDE was for boaConstructor, so I got that. Unfortunately it only spit out a useless error messages on startup and died. What I'd really like to start doing is creating C++/Python hybrids, but given that I was unable to successfully debug a pure Python app, I'm wondering what it's going to be like when my bugs might be in either language. How do people deal with this? What tools help you get the job done? If there's nothing free that works, are there any commercial IDE's worth the money?"

baxissimo asks: "I've played around with Python a bit, and as a scripting language I quite like it. So I sat down the other day to see if I could use it to make a modest OpenGL/GUI application on Windows. The short story is I gave up. I couldn't get the Python IDE I had to run--but that didn't stop me. At first I just shrugged my shoulders and said to myself 'Ah, who needs it? I've got emacs,' and then proceeded to waste a few hours trying to cobble together an app that would run before it dawned on me that Python without a decent IDE is definitely not easier to use than C++ with an IDE. So is anyone out there actually using Python to make serious apps? What tools are you using?" "I've heard the wxPython bindings are nice for the GUI bits, so I downloaded those, and pyOpenGL, and numPy, and PIL, etc. The only recommendation I really saw anywhere for an IDE was for boaConstructor, so I got that. Unfortunately it only spit out a useless error messages on startup and died. What I'd really like to start doing is creating C++/Python hybrids, but given that I was unable to successfully debug a pure Python app, I'm wondering what it's going to be like when my bugs might be in either language. How do people deal with this? What tools help you get the job done? If there's nothing free that works, are there any commercial IDE's worth the money?"

Nuclear Elephant writes "DSPAM v3.0 RC1 is now available for download, with a stable release scheduled for June 13. DSPAM has appeared on Slashdot and in Wired News in the past for its high levels of accurate spam filtering. v3.0 is the product of three solid months of work. Some of the highlights include a very sleek redesigned interface, PostgreSQL support, many mathematical enhancements, and support for many of Gary Robinson's algorithms (such as Chi-Square, Geometric Mean Test, and Robinson's technique for combining P-Values)."

Jeff Gilchrist writes "On May 15, 2004, Josh Findley discovered the 41st known Mersenne Prime, 2 to the 24,036,583th power minus 1. The number is nearly a million digits larger than our last find and is now the largest known prime number! Josh's calculation took just over two weeks on his 2.4 GHz Pentium 4 computer. The new prime was verified by Tony Reix in just 5 days using only half the power of a Bull NovaScale 5000 HPC running Linux on 16 Itanium II 1.3 GHz CPUs. A second verification was completed by Jeff Gilchrist of Elytra Enterprises Inc. in Ottawa, Canada using eleven days of time on a HP rx5670 quad Itanium II 1.5 GHz CPU server at SHARCNET. Both verifications used Guillermo Ballester Valor's Glucas program." Read on for more on the discovery, including how you can help find more primes.

Gilchrist continues "If you want to see the number in written in decimal, Perfectly Scientific, Dr. Crandall's company which developed the FFT algorithm used by GIMPS, makes a poster you can order containing the entire number. It is kind of pricey because accurately printing an over-sized poster in 1-point font is not easy! Makes a cool present for the serious math nut in your family.

For more information, the press release is available.

Congratulations to Josh and every GIMPS contributor for their part in this remarkable find. You can download the client for your chance at finding the next world record prime! A forum for newcomers is available to answer any questions you may have.

GIMPS is closing in on the $100,000 Electronic Frontier Foundation award for the first 10-million-digit prime. The new prime is 72% of the size needed, however an award-winning prime could be mere weeks or as much as few years away - that's the fun of math discoveries, said GIMPS founder George Woltman. The GIMPS participant who discovers the prime will receive $50,000. Charity will get $25,000. The rest will be used primarily to fund more prime discoveries. In May 2000, a previous participant won the foundation's $50,000 award for discovering the first million-digit prime."

Chris Vaughan asks: "Me and my Co-Workers at the Advanced Computing Research Lab are just about ready to release our first Open Source package on SourceForge.net I ask the Slashdot community what hurdles they had to overcome and how much involvement do they still have in their project years later. Also what types of licensing did you pick and why did it suit your project best? Our project, MyPBS is a PHP/MySQL/Perl frontend accounting package for the Portable Batch System (PBS). Which is used to account for super computing usage. I appreciate any comments you may have."

Chris Vaughan asks: "Me and my Co-Workers at the Advanced Computing Research Lab are just about ready to release our first Open Source package on SourceForge.net I ask the Slashdot community what hurdles they had to overcome and how much involvement do they still have in their project years later. Also what types of licensing did you pick and why did it suit your project best? Our project, MyPBS is a PHP/MySQL/Perl frontend accounting package for the Portable Batch System (PBS). Which is used to account for super computing usage. I appreciate any comments you may have."

An anonymous reader asks: "I'm in college working on an electrical engineering degree, and I've had a few labs so far involving microcontroller setups. I'd now like to start doing some microcontroller projects of my own devising, so I'll need a programmer, the development software, and the MCUs themselves. The problem is that I don't have a wide experience with the different companies selling this sort of equipment. I know about the BASIC Stamps and the PIC offerings, but what other architectures are there? Both of the MCUs I've named have development tools, but they're for Windows. Are there any companies out there that supply their tools for BSD/Linux? What open source projects are there working on this (I've found gputiles). As always, free (as in beer) is good for us college students. :-)"

NetWizard writes "According to a mailing list post at the IETF, Yahoo's website and a Wired News story, Yahoo has made the DomainKeys draft public and submitted to the IETF." Russ Nelson explains "Basically, your MTA uses RSA-SHA1 to sign the headers and body of your email and inserts that signature before sending the email. The recipient MTA looks up $selector._domainkey.$domain in the DNS, gets your public key, verifies it, and inserts a notice. There's also a SourceForge project for a DomainKeys library." An anonymous reader asks "It seems to me that it doesn't offer anything more than the Sender Policy Framework by pobox.com, other than doing relay-based signing of the messages to provide the sender verification. SPF has already grown to over 14,000 domains so far and only requires an addition to your DNS to support (from the sending side). Verifying messages on the receiving MTA is as simple as doing a DNS lookup, most MTAs can support SPF now, the code is available and well tested. What advantages to people see in Domainkeys over SPF that are actually useful, and what standard should people implement?"

rocketjam writes "OS News has an article by a user who successfully installed Mac OS X using the 0.1 version of PearPC, the PPC emulator for x86 machines. He said it took 5 hours to run the first install CD but he did get it up and running on an AMD Athlon XP 1600+ with 512MB of RAM. The article has several screenshots of the Mac OS X install and new user set up running on his machine." See our previous story.

Chase asks: "I run a couple of websites(including for my work). I'd like to have a backup web server that people would hit when my server goes down. My primary host is on my companies T1 line and even though I've had my server die once the most common reason for my sites to be offline is that our T1 goes down. I've looked at the High-Availability Linux Project but it seems that almost everything there is for failover using ip takeover which isn't an option if my network link dies and my backup server is on a different network. ZoneEdit seems to offer what I'm looking for but I'm wanting a do it myself solution. The only software I've found is Eddie and it seems to have stopped development around 2000. I know DNS based failover doesn't give 100% uptime but with a low cache time and decent monitoring it seems like it's the best solution for having my backup server at a differnt location and on a differnt network. Anyone know of a good solution? (Using Linux and/or Solaris hosts)"

hankaholic writes "I was checking into the latest progress of the Freenet project when I noticed a disturbing note on their homepage: 'Paypal has frozen the account we use to accept donations over the web, they refuse to give any reason other than "use of an anonymous proxy" [...] all of the projects subscriptions have been canceled which is a significant setback. Other means of accepting donations, including E-Gold, are still active.' Paypal is sending them a check for their remaining balance. The news update on the Freenet homepage also includes contact information for some people at Paypal."

Auzy asks: "Originally I thought that the implementation of a system in Linux which could automatically locate and install drivers would revolutionize Linux usability, however, there has been some strong negative feedback, including comments such as that it will kill open source drivers in Linux, and that even a system which employs digital signatures could never be secure enough to stop worms. I believe the opposite, and now I want to know from the Slashdot crowd, if they think I should drop the project now and potentially save Linux from possible security problems, or if I am right in saying that potential problems can be avoided, and that this system can become successful."

Auzy asks: "Originally I thought that the implementation of a system in Linux which could automatically locate and install drivers would revolutionize Linux usability, however, there has been some strong negative feedback, including comments such as that it will kill open source drivers in Linux, and that even a system which employs digital signatures could never be secure enough to stop worms. I believe the opposite, and now I want to know from the Slashdot crowd, if they think I should drop the project now and potentially save Linux from possible security problems, or if I am right in saying that potential problems can be avoided, and that this system can become successful."

Anonymous writes "Can a modded Xbox running homebrew software really beat all existing designed-for-the-living-room multimedia devices hands down?! Tom's Hardware Guide seems to think so. They reviewed Xbox Media Center (XBMC) and say the free open source software turn an Xbox into The Ultimate Multimedia Center, the ideal home playback system for audio and video. (Apparently there is a PC software version available too: Media Portal)" The article also explains some of the more convoluted issues surrounding XBMC. But I definitely agree that this is a great system.

cybrthng asks: "Mozdex.com is my attempt at building a search engine capable of indexing the entire web. Our goal is to provide a completely transparent system utilizing open technologies such as Nutch, Lucene and other systems to provide a search facility that is more scientific and 'protocol' vs the current propriety and almost 'faith based' search engine results and methods of getting listed. What do you look for out of a search engine? What would you look for out of this project? Should large commercial entities be the only way we find information and resources on the net? BTW, our beta index currently has about 50 million pages and we hope it shows what can be done using Open Source systems available today. We are seeking input on starting a developer & input community as well as getting concepts and ideas out and about, so we value your ideas and what you hope to see out of this project."

prostoalex writes "Microsoft's WTL (Windows Template Library) toolkit source code has been released to SourceForge.net [also part of OSDN, like Slashdot.] InternetNews explains that the toolkit allows a Windows developer to create quick GUIs in C++. According to the project page, WTL extends ATL (Active Template Library) and provides a set of classes for controls, dialogs, frame windows, GDI objects, and more. WTL is licensed under CPL, which is the license Microsoft chose for the SourceForge release of the WiX installer."

An anonymous reader asks: "I'm going to a demonstration of some music software products tomorrow night. The music store hosting the event may be attempting to start a users group of music software. This seems like a job for open source advocacy! Anyone know of any good F/OSS for working with music and audio? I am already aware of Audacity and (Free as in Beer) Jeskola Buzz, but what else is there in the realm of sequencers and audio manipulation?" We did another helpful article back in 2001, and another from last August. What musical creations have you put together with any of this software, and others we may have missed?

TioHoltzman writes "El Reg is reporting about a new codec that is built on top of wavelet technology and seems to offer performance that is "roughly in line with the Video Codec 9" from Microsoft. The project has been released as open source on SourceForge. This looks like it might be really interesting." (Previously mentioned a few weeks back.)

TioHoltzman writes "El Reg is reporting about a new codec that is built on top of wavelet technology and seems to offer performance that is "roughly in line with the Video Codec 9" from Microsoft. The project has been released as open source on SourceForge. This looks like it might be really interesting." (Previously mentioned a few weeks back.)

An anonymous reader asks: "A while ago OEone released a thingy called Penzilla which was basically a Mozilla desktop environment like GNOME or KDE. Everything was written in either DHTML or XUL and ran within the Gecko engine. Recently a new project, Robin was released that is basically a desktop running within Mozilla using XUL as well. There is NetWindows that attempts something similar for more interactive web applications. What advantages would a 100% Mozilla engine desktop hold and what are the disadvantages compared to much more complex environments such as GNOME or KDE? Is a Mozilla desktop possibly more elegant or efficient for the typical user? Is the XUL runtime environment more robust than troublesome C/C++ widgets? It seems like most applications could make the transition as the growing collection of Firebird extensions like ChatZilla and Gnusto and have shown."

News for nerds writes "The author of Winny, the Japanese P2P software with encrypted networking capability, similar to Freenet, has been today officially arrested for abetment of copyright violation, after the raid in the last December. He started its development in May 2002 and occasionally appeared on the web forum 2ch with his anonymous codename "47", but today turned out to be an assistant professor of computer science at the University of Tokyo in his 30s. Winny was so efficient and popular that it generated problems even at the Japanese police and the GSDF. As the Japanese police is the most advanced among the world in pulling P2P into criminal cases, outcry of users in Japan is expected."

Sebastian Biallas writes "We have finally released version 0.1 of our PowerPC architecture emulator: PearPC. The emulator itself is (prepared to be) architecture independent but only tested on x86s (here you go porters...). It also features a must faster just-in-time compilation unit for x86 hosts. This means that you can now run your favourite PowerPC-OS on x86: Mandrake Linux (9.1), Darwin (6 + 7) and Mac OS X (10.3)! And the best things is: it's GPL'd. But be warned: it's experimental.."

Sebastian Biallas writes "We have finally released version 0.1 of our PowerPC architecture emulator: PearPC. The emulator itself is (prepared to be) architecture independent but only tested on x86s (here you go porters...). It also features a must faster just-in-time compilation unit for x86 hosts. This means that you can now run your favourite PowerPC-OS on x86: Mandrake Linux (9.1), Darwin (6 + 7) and Mac OS X (10.3)! And the best things is: it's GPL'd. But be warned: it's experimental.."

Sebastian Biallas writes "We have finally released version 0.1 of our PowerPC architecture emulator: PearPC. The emulator itself is (prepared to be) architecture independent but only tested on x86s (here you go porters...). It also features a must faster just-in-time compilation unit for x86 hosts. This means that you can now run your favourite PowerPC-OS on x86: Mandrake Linux (9.1), Darwin (6 + 7) and Mac OS X (10.3)! And the best things is: it's GPL'd. But be warned: it's experimental.."

NickFitz writes "Need To Know this week has a piece about Dirac, a BBC R&D project to produce a video codec, which has been released as an Open Source project. From BBCi: 'Dirac is a general-purpose video codec aimed at resolutions from QCIF (180x144) to HDTV (1920x1080) progressive or interlaced... Our algorithm seems to give a two-fold reduction in bit rate over MPEG-2 for high definition video (e.g. 1920x1080 pixels), its original target application. It has been further developed to optimise it for internet streaming resolutions.'"

reddigitaldragon asks: "Some people re-install once a year, but if you're anything like me your machine is formatted at least once a month. After the OS is in, then come the favorite/must have/most used programs to install. My first installations for Windows (I use it; get over it): Trillian, Winrar, Firefox, Winamp, SmartFTP, Azureus, NMap, GKrellM, PowerDVD. What are your First 10 installed programs?" What are the first 10 programs you would install on a Windows machine? How about for a Unix machine?

orasio writes " Joe's Own Editor , a unix editor very much like the old Turbo-Pascal 4 editor, or WordStar, used and enjoyed by us console freaks who still miss the old DOS days, and cannot finish understanding vi's modes, has been revamped, adding syntax highlighting and internationalization support after many years without new features. The Sourceforge project is open for contributors since a year ago, but this is the first major feature improvement, that brings new life to JOE as a neat console-based programmer's editor." Joe is one undervalued program -- less arcane than vi, less cumbersome than emacs.

orasio writes " Joe's Own Editor , a unix editor very much like the old Turbo-Pascal 4 editor, or WordStar, used and enjoyed by us console freaks who still miss the old DOS days, and cannot finish understanding vi's modes, has been revamped, adding syntax highlighting and internationalization support after many years without new features. The Sourceforge project is open for contributors since a year ago, but this is the first major feature improvement, that brings new life to JOE as a neat console-based programmer's editor." Joe is one undervalued program -- less arcane than vi, less cumbersome than emacs.

RAMMS+EIN writes "Everyone's favorite instant messenger, Gaim, has recently been forked. The new gaim-vv project aims to provide voice and video chat support, which will eventually be backported into the main branch." Nice to see an amicable fork; it sounds like this will mean competition for GnomeMeeting.

morrison writes "BZFlag, a 'free multiplayer multiplatform 3D tank battle game', is the Sourceforge [part of OSDN, as is Slashdot] April 2004 Project of the Month, and the award page features details and an interview with the creators. Hopefully other well-deserving Open Source games will receive recognition down the road." The creators explain the game "runs on Irix, Linux, *BSD, Windows, Mac OS X, and other platforms", note: "There are about 53,000 players in the statistics", and mention plans: "We hope to build a karma system that enables the community to guard against cheats and abuses."

herrvinny asks: "What is the best weblog script to use on a personal web site? SourceForge and Google show plenty of weblogging systems available, but I just need a simple, powerful solution. Movable Type has been recommended to me, but I've heard of problems with spam, exploits, and comment flooding. I'd like to have a decently good comments section, where visitors can reply to my ramblings and have a fairly large toolset in which to do so, i.e. smilies, some limited HTML (bold, italic, etc). A small Polling plugin would be terrific as well. Which weblogging systems do Slashdot readers use and recommend? Some complexity isn't a problem; I can work in Perl, HTML, C (among other languages) if I need to. Also, what do people think of adapting Slashcode for such purposes?"

Thanks to Monster Hardware for its article discussing the problems of getting classic DOS games working on today's state-of-the-art PCs. The author discusses trying the Microsoft Program Compatibility Wizard ("After fooling around with a number of games I was able to get a few of them half-way working"), before trying the DOSBox freeware util "...not perfect: Some games run, some games don't." After "trying and mainly failing for the last several weeks to get a handful of old DOS games... to run on a modern PC", is this author's experience typical, or are there any other ways to get old DOS titles running easily?

eugene ts wong asks: "I was looking over SHFS, & I thought that this seems like a very good software package. If I understand it correctly, then it should be the defacto way to mount shares across a network. I never heard of it till today, though. What do all of you think of this? What kinds of experiences do you have? I am interested in hearing some of your stories. I heard that NFS isn't secure. How do they both compare? Would you recommend SHFS for small, medium & large businesses?"

Thanks to an anonymous reader for pointing out that CrossCut Games has released the source code and a fully unlocked playable version of RuneSword 2, a "[Windows based] CRPG designed to appeal to 'pen and paper' role-players. The game comes with two full-length adventures, a number of smaller adventures, and a completely flexible construction set." There's more information over at the CrossCut Games forums for the game, where it's noted that the developers "had to remove the music files", but "all the source code (and the unlocked version of RS2)" are currently available, with "another few hundred meg of 'unused' graphics, sound and many other tid bits" that may be released in the future.

Ade writes "One may now listen and search for Apple iTunes music via this front end or any webserver running the perl script called iTMS-4-ALL, which was written by Jason Rohrer, programmer of the secure filesharing system MUTE who hopes the script 'helps revive everyone's ITMS interfaces.' Music activists Downhill Battle, who organised the Grey Tuesday protests for disseminating censored music, run a copy of the script and say 'this is a cute tool, but it has the potential to become a powerful weapon to fight the major record label monopoly' in the ways they outline. Playing the music requires QuickTime for the ~600kb downloadable MP4 snippets to be heard." Update: 04/19 01:41 GMT by H : Thanks to Aaron at Punboy for sending us a link to a faster server.

Ade writes "One may now listen and search for Apple iTunes music via this front end or any webserver running the perl script called iTMS-4-ALL, which was written by Jason Rohrer, programmer of the secure filesharing system MUTE who hopes the script 'helps revive everyone's ITMS interfaces.' Music activists Downhill Battle, who organised the Grey Tuesday protests for disseminating censored music, run a copy of the script and say 'this is a cute tool, but it has the potential to become a powerful weapon to fight the major record label monopoly' in the ways they outline. Playing the music requires QuickTime for the ~600kb downloadable MP4 snippets to be heard." Update: 04/19 01:41 GMT by H : Thanks to Aaron at Punboy for sending us a link to a faster server.

Ade writes "One may now listen and search for Apple iTunes music via this front end or any webserver running the perl script called iTMS-4-ALL, which was written by Jason Rohrer, programmer of the secure filesharing system MUTE who hopes the script 'helps revive everyone's ITMS interfaces.' Music activists Downhill Battle, who organised the Grey Tuesday protests for disseminating censored music, run a copy of the script and say 'this is a cute tool, but it has the potential to become a powerful weapon to fight the major record label monopoly' in the ways they outline. Playing the music requires QuickTime for the ~600kb downloadable MP4 snippets to be heard." Update: 04/19 01:41 GMT by H : Thanks to Aaron at Punboy for sending us a link to a faster server.

John Hering writes "It was bound to happen.... Security Robots that are "Wi-Fi" enabled and capable of enterprise-grade tasks. Details have emerged about a robotics platform that combines cutting edge security and wireless technologies and is capable of integration with buildings' central heating and cooling systems, security systems, air quality controls, wi-fi networks, and even lighting and power systems to provide valuable building services and emergency back-up. It can even greet guests, guide them to their destinations or lead building tours! Similar projects in the past have pushed these robotics technologies forward and spawned numerous new projects , especially amongst the linux community."

lidocaineus asks: "I work at a small company with about 30 workstations. Two of us run Linux and three use Mac OS X, so on one of the servers, we installed Teg (both the server daemon and client). It works well since as a turn based game, the five of us are not beholden to it every second of the day, and can turn to it when we have a few free moments (and group chat all in one place other than through Jabber). Recently, some of the Windows folks have become interested in joining. Other than by using cygwin (these are serious computer-challenged types), are there any cross platform turn-based type game clients that work on Windows, preferably using the Linux server as a, well, server? Obviously we're not looking for a quake fest."

cpfeifer asks: "Russ Miles wrote about going through the pain of setting up his own infrastructure for his OSS project, AspectXML. He asks: 'Are there tools out there that make this process much easier, and perhaps ones that I could take advantage of by moving my own open source project to? Also what experiences have people had with the different community projects?' Should you start up your own gforge server, host it on Sourceforge, or perhaps look to one of the OSS groups like Apache, Codehaus or Tigris?"

yipyow writes "A few weeks ago VIA Technologies posted software based on Nullsoft's WASTE, as reported here a few days ago. VIA PadLockSL included both a Windows and Linux client and some special extensions to work with security hardware built into certain VIA products. It was released under the GPL so I managed to snag a copy of the source code right before VIA suddenly removed their page (Google cache). I have posted Linux compilation instructions and mirrored the source here. If VIA has decided not to pursue the project further, I think the F/OSS community should turn this project into something, it has potential to be a great tool."

daten writes "VIA has released the source code to their Padlock SL product, based on the Nullsoft WASTE code previously pulled by AOL. Padlock SL offers encrypted chat, instant messaging and file sharing over a private peer-to-peer network. Unlike WASTE, which is still under active development, the VIA client offers a graphical interface for both Windows and Linux users and simpler configuration."