DRBL – About

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DRBL (Diskless Remote Boot in Linux) is free software, open source solution to managing the deployment of the GNU/Linux operating system across many clients. Imagine the time required to install GNU/Linux on 40, 30, or even 10 client machines individually! DRBL allows for the configuration all of your client computers by installing just one server (remember, not just any virtual private server) machine

via DRBL – About.

DRBL uses PXE/etherboot, NFS, and NIS to provide services to client machines so that it is not necessary to install GNU/Linux on the client hard drives individually. Once the server is ready to be a DRBL server, the client machines can boot via PXE/etherboot (diskless). “DRBL” does NOT touch the client hard drives, therefore, other operating systems (e.g. MS Windows) installed on the client machines will be unaffected. This could be useful in, for example, during a phased deployment of GNU/Linux where users still want to have the option of booting to Windows and running some applications only available on MS windows. DRBL allows great flexibility in the deployment of GNU/Linux.

Survivorship Bias

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Taking survivorship bias into account, Wald went ahead and worked out how much damage each individual part of an airplane could take before it was destroyed – engine, ailerons, pilot, stabilizers, etc. – and then through a tangle of complicated equations he showed the commanders how likely it was that the average plane would get shot in those places in any given bombing run depending on the amount of resistance it faced. Those calculations are still in use today.

via Survivorship Bias « You Are Not So Smart.

Simply put, survivorship bias is your tendency to focus on survivors instead of whatever you would call a non-survivor depending on the situation. Sometimes that means you tend to focus on the living instead of the dead, or on winners instead of losers, or on successes instead of failures. In Wald’s problem, the military focused on the planes that made it home and almost made a terrible decision because they ignored the ones that got shot down.

USA Intellectual Property Theft Commission Recommends Malware!

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“Additionally, software can be written that will allow only authorized users to open files containing valuable information. If an unauthorized person accesses the information, a range of actions might then occur. For example, the file could be rendered inaccessible and the unauthorized user’s computer could be locked down, with instructions on how to contact law enforcement to get the password needed to unlock the account. Such measures do not violate existing laws on the use of the Internet, yet they serve to blunt attacks and stabilize a cyber incident to provide both time and evidence for law enforcement to become involved.”

via Lauren Weinstein’s Blog: USA Intellectual Property Theft Commission Recommends Malware!.

Why Tumblr Was a Massive Steal for Yahoo

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Everyone’s Facebook feed is pretty much the same as everyone else’s of the same age. Twenty-year-olds pose in the club, 30-year-olds share wedding photos, by age 40 you’re looking at a lot of cute pictures of your friends’ kids. But with Tumblr, you never know what you’re going to get — even with people you know personally. That, in a nutshell, is the difference between a social graph and an interest graph.

via Why Tumblr Was a Massive Steal for Yahoo – Adam Rifkin – Voices – AllThingsD.

Here’s an interesting tidbit from TechCrunch written Feb 2013.  From Tumblr Is Not What You Think

Pop quiz: what is the favorite social networking site of Americans under age 25? If you guessed Facebook you are way behind the eight-ball, because Tumblr now enjoys more regular visits from the youth of America. That figure struck me while reading Garry Tan’s January 2013 survey and I wondered why? So I delved deeper; this article describes what I discovered while exploring the Tumblr network.

Scientists growing new crystals to make LED lights useful for office, home

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Technically the LEDs produce light by passing electrons through a semiconductor material, in combination with materials called phosphors that glow when excited by radiation from the LED. “But it’s hard to get one phosphor that makes the broad range of colors needed to replicate the sun,” said John Budai, a scientist in ORNL’s Materials Science and Technology division in a release. “One approach to generating warm-white light is to hit a mixture of phosphors with ultraviolet radiation from an LED to stimulate many colors needed for white light.”

via Scientists growing new crystals to make LED lights useful for office, home.

BT Lights Up World’s First 800Gbps Fibre Super Channel

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Laboratory tests have reached 800Gbps before, but this is the first time it’s gone long distance, covering the 410km between BT’s Adastral Park research centre, near Ipswich in Suffolk, and the BT Tower in London, using equipment from network kit vendor Ciena. The surprising thing is that the test was successful on fibre which was previously not considered good enough to carry 10Gbps.

via BT Lights Up World’s First 800Gbps Fibre Super Channel.

AT&T’s new monthly stealth fee has some crying foul

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Because the fee is so small, some call it a below-the-line charge because customers aren’t likely to notice it. That aside, it is also provides a way for carriers to advertise a lower fee than customers are actually charged. Presently, AT&T already charges about 50 cents as regulatory cost recovery charge per phone line, something that has been part of the carrier’s bills for about a decade.

via AT&T’s new monthly stealth fee has some crying foul – SlashGear.

Get An Inside Look At The Rackspace ‘Castle’ Via Google Street View

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Recently, we had a photographer come out to create an inside Google Street View of our HQ so our customers, friends and family – anyone, really – can get a virtual feel for what it is like to work at Rackspace. There’s a ton to see.

via Get An Inside Look At The Rackspace ‘Castle’ Via Google Street View – The Official Rackspace Blog.

3-D Printing Will Soon Become a Routine Manufacturing Tool

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Additive manufacturing—the industrial version of 3-D printing—is already used to make some niche items, such as medical implants, and to produce plastic prototypes for engineers and designers. But the decision to mass-produce a critical metal-alloy part to be used in thousands of jet engines is a significant milestone for the technology. And while 3-D printing for consumers and small entrepreneurs has received a great deal of publicity, it is in manufacturing where the technology could have its most significant commercial impact

via 3-D Printing Will Soon Become a Routine Manufacturing Tool | MIT Technology Review.