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This tutorial shows how to combine four single storage servers (running Mandriva 2010.0) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replication1) as well as 3 and 4 (replication2) will mirror each other, and replication1 and replication2 will be combined to one larger storage server (distribution). Basically, this is RAID10 over network. If you lose one server from replication1 and one from replication2, the distributed volume continues to work. The client system (Mandriva 2010.0 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

a digital video camera with resolution from 160x128 to 1280x1024 pixels, laser pointer or optional ultrasonic ranging, and WLAN 802.11b/g networking on a quad-motor tracked mobile robotic base. Looks like a cool toy, doesn't it? Now add a rugged aluminum housing, gps a camera inside the housing and heavier tracks and you get this:

The cross-site scripting filter that ships with Microsoft’s Internet Explorer 8 browser can be abused by attackers to launch cross-site scripting attacks on websites and web pages that would otherwise be immune to this threat.

A computer security researcher has launched a project designed to provide people greater privacy when using Google, as the company expands the scope of data its collects about its users.

If you ask what's missing from open source software, one of the top responses is often "documentation." While there's piles and piles of great code stuffed up on Google Code, SourceForge.net, and others, the actual documentation to accompany it is often lacking. This is why it's doubly sad to keep seeing bounty programs aimed at generating more and more code, and more and more coders, but very little being done to address documentation.

Some GNOME developers have gathered in Boston for for a Python GNOME hackfest that is hosted by the One Laptop Per Child (OLPC) project. The primary goals behind the hackfest include establishing a strategy for delivering Python 3.0 compatibility for the GNOME platform and advancing the Python GObject introspection project.

For a long time KDE has come with an assortment of games. Collectively, this suite of games is simply called “KDE Games“. With the advent of KDE 4, all of the KDE games were given face lifts and a standard set of features that make moving from game to game a seamless exercise. The games are two dimensional and do not run inside of a separate layer like SDL. Instead they run inside a normal KDE window, utilizing the standard QT interface. Nevertheless, the rendering of of the graphics is amazingly impressive because of the use of SVG vector graphics. With SVG, the animations are smooth and the images are scalable. You can play in a small window or maximize it without losing any of its quality.

In 2007, Sun released the Sun ODF Plugin for Microsoft Office, as a closed source but free application which allowed Microsoft Office users to export and import documents in Open Document Format. Although the Oracle site still, at the time of writing, offers the software for free with the tagline "Get it now: FREE", users clicking through will find that Oracle are now charging $90, per user, for a right-to-use license for the plug-in and offering support costing $19.80 per user for the first year. Oracle also requires a minimum order of 100 licenses, which means the minimum purchase is $9,000.

Many technologies such as Flash, MP3 and DVD are proprietary or patent encumbered and can not be included on the Ubuntu CD. Thankfully, it’s extremely easy to set up your new Ubuntu system to play just about any media file you can throw at it.

Google is reportedly working on a tablet computer based on its Android operating system, not the Chrome OS. Google has declined to comment on the tablet rumor, but that hasn't stopped analysts from mulling over the operating system choice.

On March 10, 2010, the HelenOS project released version 0.4.2 of their operating system. HelenOS sits on top of the SPARTAN kernel, which supports SMP, multi-tasking and multi-threading on a variety of common architectures. One of the developers behind HelenOS, Jakub Jermar, was willing to take time out of his busy schedule to answer some questions.

There are some superb desktop Linux distributions that are designed to work with very old hardware. For example, Puppy Linux is a great choice to quickly turn an old PC into a secure, easy to use word processing, email and light web browsing workstation. Puppy can work minor miracles on very old hardware, and I carry a Puppy boot CD-ROM around with me as my emergency recovery system.

Getting traditional TV to work in linux can be an exercise in frustration at times. For those with a Hauppauge PVR 150/250/350/500, you are in luck. The following tutorial will get you up and going in no time. It Is aimed at ubuntu users, but if you are a bit resourceful, you will be able to get it to work on the distro of your choice.

Hello again for another interview with KDE people. Last time we had Aleix Pol with us. Now it is time for Thiago Macieira. One of the first KDE developers, he is still working towards world domination at Qt Software as he will explain to us in the interview. For the Italian readers here is the original interview.

Apple ups the ante against Android with iPhone OS version 4 -- but first they have to answer to the 3.3.1 worm.

We know that the jury in SCO v. Novell decided that SCO didn't get the copyrights in 1995 under the APA or by Amendment 2 or any fusion thereof. That killed SCO's slander of title claim as well. But that isn't the end. There were some issues the parties agreed before the trial which would be decided by Judge Ted Stewart. That has yet to happen.

Two and a half days after dropping off the map in Washington, D.C., Frank staggered off a Greyhound bus in Las Vegas, Nevada. Though tired and dirty, he felt more energized over the task at hand than over anything else he could recall in years. Now it was time to get down to work! But first, he had to find his ride.

One of the big reasons people disable ModSecurity is that they see in their logs continual blocks on Googlebot. Obviously, if Google’s bot cannot list your site you will be in trouble with trying to get people to your site.

LXer Feature: 19-Apr-2010

This week its all about choosing, switching, installing and migrating to Linux along with the question; Can I be a Windows, Apple, Linux, and Google guy all at once? Also, Microsoft wants to play the Open Source game, why iPhone/iPod Touch/iPad Owners should use Linux and why I Want My Daughter to be a Hacker. Enjoy!

I'm no kernel hacker. Hell, I'm no regular hacker. I don't know exactly (or even slightly) how they do it, but after a crash while testing suspend/resume in the 2.6.32.21 kernel while running Ubuntu 10.04 Lucid — still in beta as of this writing — I rebooted and got that little "something crashed" icon in my upper panel. It asked me if I wanted to file a bug report, and I did. Whatever the Ubuntu developers have going that enabled me to file this bug automatically with a whole mess of attachments that detail the here and now of my system, I am pretty much in awe.