satch89450 asks: "I am one of the authors of the book Linux IP Stacks Commentary published by Coriolis Press. This book comments the TCP/IP code in Linux kernel 2.0.34. The history of the book is described here in detail, including our reasons for 'leapfrogging' the 2.2 releases and going right to 2.4. Yes, it's long past time to update the book, especially as kernel 2.4.0 has many, many changes in the TCP/IP code and is in test release as you read this. Our problem is how to fund the effort. Coriolis appears not to be interested in another round at this time. Heather and I are both professional writers, and that's how we make our living. Given the amount of work, donating the effort is out of the question -- it wouldn't keep kibble in the kitty bowls and have the material available in a timely fashion. We're looking for ideas." One of the largest complaints about Linux is that there is a lack of high-profile documentation. It would be sad if this publication were not made simply because of the lack of funds (which some people would see as a lack of interest) necessary to complete it.

On Aug. 30 several folks who have written Linux drivers and apps relating to the free barcode scanner mentioned here a few days ago were sent cease and desist orders demanding that they stop distributing the code. [updated by timothy 20:00 GMT: Please note that what flyingbuttmonkeys received is not officially a "cease and desist" letter; instead, it merely says that the longer the drivers are available, the "longer damages will accrue," citing "intellectual property rights owned by Digital Convergence." ] The barcode scanner is called a CueCat (with some lame marketroid colons that I'm not using because it irritates me when people name things like that). The code included a device driver written by Pierre-Philippe Coupard and a reader/decrypter written by Michael Rothwell. The code is afaik unavailable, but hopefully folks who downloaded it will have mirrors soon. I asked Michael to describe to me what his decoder did, and a few other questions.

swestbrook asks: "I would like to know if there are any efforts out there to submit a Linux distribution or the kernel at large for U.S. governmental testing to see if it will be certified to be Defense Information Infrastructure Common Operating Environment (DII/COE) compliant. I am a program manager for a very small program in the U.S. Air Force and would like to be able to use Linux as a possible platform for my standard systems. However, I cannot because regulations require me to use only operating systems that are DII/COE compliant. Information on DII/COE compliance can be found at here. Until it is officially certified I can not rehost applications on a Linux platform. Any information would be greatly appreciated."

Spyky writes: "A fairly new product from HP, the Jet Direct 4000 Printing Appliance includes a 266 MHz PC processor, a 5.2 GB HD, 64 MB of RAM and runs the Linux operating system. However, it fails to recognize Linux, or any non-Microsoft operating system as a valid client. In essence HP recognizes Linux as an operating system powerful and stable enough to trust their Printing Server Appliance to, yet are unwilling to commit to supporting that very same operating system as a client."

Networks are everywhere, and more of them than ever are running Linux, which makes sense given its cost and its Unix background. If you're responsible for more than a handful of networked Linux machines, you probably run into more than a few situations each day that you wish you had a trusted advisor (or a few) to help you get through. How do I set up a server for [task X]? What do I do when my mail storage needs change? Christopher Thompson here briefly dissects O'Reilly's Linux Network Administrator's Guide, which promises to be a decent partner when you have network SNAFUs, at least much of the time.

Sits asks: "Every year my univerisity's computer society hopes to entice new students to join by running a computer display. Last year we ran Q3 test on a Win98 system, but this year we would like to demo something running on Linux. Does anyone know of a flashy way to demonstrate Linux to regular people? Does Linux have an active demo scene and if so would a display of those be appealing to non-technical users?"

A reader writes "Check the latest Kurt's Closet; he points to some interesting flaws on Debian 2.2, from a security point of view. " Kurt's Closet is part of SecurityPortal - he's got some good points, but it's also good to remember, as the article points out, that nothing is automagically secure. Always do testing on your own.Update: 08/30 01:44 PM by H :Thanks to Ben Collins, Debian guy, for sending a response which I've included below.Update: 08/30 04:32 PM by H :Kurt has written an update that will be appearing on the site soon. In the meantime, he also sent me the text - read below for more.

cmuncey writes: "Salon has an Associated Press article that IBM, HP, Intel, NEC have announced an 'Open Source Testing Lab' for testing Linux for large corporate systems that will open by the end of the year in Portland, OR. The main four sponsors are putting up a couple of million and Red Hat, Turbolinux, Linuxcare, VA Linux, Dell and SGI are also kicking in. The lab itself will be run by a nonprofit corporation that will be neutral in picking the projects to be tested. Sounds a bit better Mindcraft, doesn't it?"

Malcontent asks: "Since it's possible to tweak Linux to a high degree I wonder what tricks can be employed to make Linux a better database server. I am not talking about obvious hardware improvements like RAID, more processors or memory because they apply to any operating system. I am looking more for Linux specific things like kernel settings and disk/filesystem tricks which may improve performance."

Madman Chromatic (coder, writer, thinker) sheds even more light on the books lurking on store shelves designed to lure, and then snare, new or uncertain users into trying out -- and actually enjoying! -- this wacky "Linux thing." This time around, the texts he's chosen cover the topics of installation and day-to-day operation of a Linux system in greater depth than the Dummies series dares to, but they're still aimed squarely at competent, literate users rather than only at technical gurus. Read on for his insights into Using Linux, Linux Configuration & Installation, and the Linux Essential Reference.

Maktoo writes: "Just checked out the latest Netcraft survey and it has a very interesting new feature breaking out the differences between "Total Web sites hosted" and total *active* Web sites. The pie charts are about 3/4 the way down the page. They show that in total sites, Linux and MS have 35% and 21% marketshare respectively... but when it comes to actual active sites, that gap shrinks to 29.9% and 28.3% respectively. Netcraft have figured out a way to try to eliminate the millions of place holder pages out there that aren't actually serving content, thus not really Web sites. Apache's marketshare also shrinks a little, but it's still an impressive 59%. It's an interesting read."

Dreddlox writes "I'm looking at a company producing cluster management software for Linux-based clusters such as Beowulf and would like to get a feel for waht's out there right now. I know Turbolinux for example has a product, enFuzion as do a few others. I'm trying to get a complete list of the players in this market as well as on any open source software and distributions of it if any exist. Also if anybody has any pointers or information on the use of Linux clusters in non-military and non-academic applications (such as auto manufacture and finance) especially outisde the US. I'm curious as to potential for such software in Europe and Asia (with all the talk of China being a ripe market for Linux due to the open source angle)."

PapaZit writes: "Government Computer News is reporting that the DOD isn't willing to adopt Linux...yet. They're eager enough to do so, however, that they're considering relaxing the requirements for POSIX compliance and Motif." That may be true, but the article only mentions folks from VA Linux and Red Hat as advocating this idea. After all, those wacky Linux people favor "letting anyone have a crack at modifying it, which could represent a security compromise for military systems for command, control, communications, computers and intelligence." Not to worry -- you're probably aware that Free software has long been at work and play in serious government applications; reader sdriver points out a few of them below.

truefluke writes: "This was forwarded to me, from a friend who is a very loyal Debian supporter, with the cool news that Debian could become 'more up to date more often'. This news appeared here on the Debian news source. A good idea, and prob incentive for more folks to try out Debian without resorting to the old saw of 'too old / too slow.'" Debian developer Anthony Towns says in the list posting mentioned there that "[t]his is a (mostly finished) project that will allow us to test out distribution by making it "sludgey" rather than frozen[.]" Sounds like the same logic behind the Caldera "Technology Preview" and Red Hat's Rawhide -- give people more of what they want of The Bleeding Edge, without getting reckless with the official release.

chromatic is back with a mini-compendium of introductory Linux texts -- and yes, they have the famously protected "Dummies" trademark. Don't scoff at the nature of these books, though; the skill of translating the arcana of any computer topic (and boy are they all arcane to the uninitiated!) into language that mom, kids and the guy down the street can understand is not a common one. If you don't know what a root prompt (or an editor) is, or why you might want one, it's hard to do much else with your system.

Spiral Man writes: "There has been a lot of talk lately about Linux on handheld and embeded device. One interest of particular interest to me is in-dash computers for cars. Probably the most important app for one of these (aside from the CD player) would be a navigation and trip planing package such as DeLorme's Street Atlas, and Microsoft's Streets USA. My question is: Are there any apps, or even plans to write apps like this for Linux. Preferably these would use a commercial, or at least well updated, street database, and would have to be able to track you current location with a GPS." Especially considering the coming flood of GNU/Linux-based handhelds and dashboard computers, this question will be one of the toughies for folks who want to use Free software wherever possible, but who also want the capabilities in applications like Streets USA. Are there any competitors out there in the Free world?

A reader writes " According to the German Heise Newsticker Linux is the top server for .de-domains both in terms of IP addresses and domain names hosted. The survey carried out by the company iKu Netzwerklösungen surveyed all of almost 2.5 million connected .de-domains distributed over 205.540 IP addresses with the port scanner nmap. 44 percent of IP addresses surveyed were hosted by Linux, 30 percent by Windows. In terms of domain names hosted Linux has an even greater lead, with over 1.1 million domaines. Solaris follows with about 850,000 names, of which 180,000 are hosted on just two Solaris boxes belonging to Germany's biggest webspace provider Strato. Windows follows in 3rd place with just 10%. " Check out the fish if you don't jive deutsch.

Paul Bristow writes "I've been using a Headless Linux server at home for years and years, but I always find myself putting off doing a distro upgrade. It always means digging out the old graphics card, keyboard and monitor, dusting them off and plugging them in, just so I can have a console to upgrade on. Are there any linux distributions that will allow remote upgrades? You know, log in as root viua ssh, webmin, whatever, run upgrade prog, remotely reboot, off we go. ;-) I know I'm not the only one running a headless server, and I *know* how stable it is, but occasionally RedHat (in my case) come out with a nice new feature that I might want to upgrade for. Also, with just one server it might just be possible, but how do you upgrade a headless server farm?"

TillmanJ writes: "Just a quick note to let everyone know that the New Linux Myth Dispeller is online at http://www.eruditum.org/lin ux/myths/myth-dispeller.html It is not, however, ready for prime-time, but is usable. If anyone has anything to add/correct/bitch about, send me some email. In patricular, I would like to work with some non-english-speaking folks to translate it into whatever langs we can" Useful for clearing up the misconceptions of PHBs and other folks.

A reader wrote to us about "Notes From The Cathedral", which is sort of a tell-all from a former developer of a "major software company". An interesting, if somewhat sad, read.