QEMU | BLUETOOTH | SCTP | NAVICORE AND MAEMO MAPPER LINUX JOURNAL ™ UU Bluetooth Phone Access ULTIMATE LINUX BOX ULTIMATE UU Fedora Directory Server UU Four Powerful Servers UU Stream Control Transmission Protocol Since 1994: The Original Magazine of the Linux Community SEPTEMBER 2007 | ISSUE 161 ULTIMATE LINUX QEMU | Bluetooth | SCTP | Navicore and Maemo Mapper | Django FDS QEMU | Bluetooth SCTP Navicore HANDHELD The Nokia N800 is all that and more SEPTEMBER + www.linuxjournal.com 2007 ULTIMATE ULTIMATE $5.99US $6.99CAN 09 ISSUE LINUX LAPTOP LINUX BOX The Raven X60 Tablet DIY Ultimate Linux Box 161 Ultimate Laptop for less than $4,0000 0 74470 03102 4 Manage Any Data Center. Anytime. Anywhere. Avocent builds hardware and software to access, manage and control any IT asset in your data center, online or offl ine, keeping it, and your business, “always on”. Visit us on our Remote Control Tour. For locations near you, go to Avocent, the Avocent logo and The Power of Being There, are registered www.avocent.com/remotecontrol. trademarks of Avocent Corporation. ©2007 Avocent Corporation. AvocentRemote_LinuxJournal.indd 1 5/8/07 1:01:52 PM SEPTEMBER 2007 CONTENTS Issue 161 FEATURES ULTIMATE LINUX BOXES THE ULTIMATE THE ULTIMATE THE ULTIMATE 51 LINUX HANDHELD 54 LINUX LAPTOP 58 LINUX BOX Much more than a successor to the 256 levels of pressure for this DIY options for the Ultimate or Nokia 770. Ultimate Laptop Tablet. Penultimate Linux Box. Doc Searls and Jim Thompson James Gray Nicholas Petreley ON THE COVER • Bluetooth Phone Access, p. 66 • Fedora Directory Server, p. 72 • Four Powerful Servers, p. 80 • Stream Control Transmission Protocol, p. 88 • Ultimate Linux Handheld, p. 51 • Ultimate Linux Laptop, p. 54 • Ultimate Linux Box, p. 58 2 | september 2007 www.linuxjournal.com Agility. With Coyote Point, you'll never have to wonder if your network is fast enough or flexible enough. You'll know it is. From local to global load balancing, application acceleration or ultimate network manageability, Coyote Point leads the pack. We take the guesswork and difficulty out of application traffic management. You won’t find anything faster, smarter or more affordable. Find out why more than 2,000 businesses rely on us to maximize their infrastructure. Learn what Coyote Point could mean to your Web and network traffic. Write [email protected] or call 1-877-367-2696. CoyotesCoyotes respondrespond withwith lightninglightning speed.speed. YourYour networknetwork should,should, too.too. Copyright © 2007 All rights reserved. www.coyotepoint.com SEPTEMBER 2007 CONTENTS Issue 161 COLUMNS INDEPTH 18 REUVEN M. LERNER’S 66 HACKING CELL PHONES AT THE FORGE VIA BLUETOOTH TOOLS Database Modeling with Django UNDER LINUX Want to exchange files between PC 26 MARCEL GAGNÉ’S and cell phone? COOKING WITH LINUX Patrick Davila Still Searching for the Ultimate Linux Distro? 14 CHUMBY Next Month 72 FEDORA DIRECTORY SERVER: MULTIMEDIA 32 DAVE TAYLOR’S THE EVOLUTION OF LINUX WORK THE SHELL AUTHENTICATION It's a telephone. No, it's a TV. No, it's a radio. No, it's a calculator. Baccarat Punto Banco, Part II Want an alternative to OpenLDAP? No, it's a video conferencing Jeramiah Bowling 36 JON "MADDOG" HALL’S device. No, the Tornado M20 VoIP BEACHHEAD phone and digital media center is all of these things and more. Education It is a remarkable device no bigger than a business phone, DOC SEARL’S 38 and it's all powered by, you LINUX FOR SUITS guessed it, Linux. Read all Navigating with the Nokia N800 about it in next month's issue. And, while we're on the subject of hot devices, we'll get you started programming for the Trolltech Greenphone too. 80 A $7,000 SERVER COMPARISON As always, there's much more. Go big time with your server choice. We'll take you on a tour of a Linux-based home management Peter Arremann 96 NICHOLAS PETRELEY’S system and show you how nicely /VAR/OPINION the video editor KDENLIVE is The Ultimate Linux PVR 88 INTRODUCTION TO STREAM coming along. Also in next issue, CONTROL TRANSMISSION IBM's Bob Sutor shares his PROTOCOL thoughts on open standards IN EVERY ISSUE Blessed by the IETF. and open source. 8 LETTERS Jan Newmarch 12 UPFRONT 16 TECH TIPS USPS LINUX JOURNAL (ISSN 1075-3583) is published monthly by Belltown Media, Inc., 2211 Norfolk, Ste 514, Houston, TX 48 NEW PRODUCTS 77098 USA. Periodicals postage paid at Houston, Texas and at additional mailing offices. Cover price is $5.99 US. Sub scrip tion rate is ADVERTISERS INDEX $25/year in the United States, $32 in Canada and Mexico, $62 elsewhere. POSTMASTER: Please send address changes to Linux 81 Journal, PO Box 980985, Houston, TX 77098. Subscriptions start with the next issue. 4 | september 2007 www.linuxjournal.com 'RQ·WIHHOEDG 2XUVHUYHUV ZRQ·WJRGRZQ RQ\RXHLWKHU :H¶YHDOONQRZQGLVDSSRLQWPHQW$QGIHZWKLQJV DUHPRUHGLVDSSRLQWLQJWKDQXQGHSHQGDEOH H[SHQVLYHVHUYHUVWKDWGRQ¶WVDWLVI\\RXUQHHGV 7RDYRLGWKHKHDUWEUHDNRIORVWH[SHFWDWLRQV 462/SURYLGHVGHSHQGDEOHVHUYHUVROXWLRQVIRU YLUWXDOO\DQ\SRSXODURSHUDWLQJV\VWHPDWDSULFH WKDWZLOOEORZ\RXUPLQGQRW\RXUEXGJHW 462/FRP6HUYHU$SSOLDQFHVFRPHLQDYDULHW\RI FRQILJXUDWLRQVWRPHHWWKHPRVWVSHFLILFQHHGVRI RXUXVHUV:KHWKHU\RX¶UHLQWR8ZLWK&RUHV RU8ZLWKQHDUO\7HUDE\WHVZHFDQSURYLGHDVHUYHU WKDWFDQSHUIRUPXQGHUWKHPRVWGHPDQGLQJFRQGLWLRQV ,I\RXUVHUYHULVQ¶WJLYLQJ\RXZKDW\RXZDQWYLVLW462/ 'RQ¶WZRUU\LW¶VDVXUHWKLQJ T '48'422.+#0%'5 6HUYLQJ6HUYHUVVLQFH 462/&20,1&$OOULJKWVUHVHUYHGDOOWUDGHPDUNVDUHWKHSURSHUW\RIWKHLUUHVSHFWLYHFRPSDQLHV 7KHSHUVRQSLFWXUHGLQWKLVDGYHUWLVHPHQWLVDPRGHODQGLVXVHGIRULOOXVWUDWLYHSXUSRVHVRQO\ Editor in Chief Nick Petreley, [email protected] Executive Editor Jill Franklin [email protected] Senior Editor Doc Searls [email protected] Art Director Garrick Antikajian [email protected] Products Editor James Gray [email protected] Editor Emeritus Don Marti [email protected] Technical Editor Michael Baxter [email protected] Senior Columnist Reuven Lerner [email protected] Chef Français Marcel Gagné [email protected] Security Editor Mick Bauer [email protected] Contributing Editors David A. Bandel • Ibrahim Haddad • Robert Love • Zack Brown • Dave Phillips Marco Fioretti • Ludovic Marcotte • Paul Barry • Paul McKenney • Dave Taylor Proofreader Geri Gale Publisher Carlie Fairchild [email protected] General Manager Rebecca Cassity [email protected] Director of Sales Laura Whiteman [email protected] Regional Sales Manager Joseph Krack [email protected] Regional Sales Manager Kathleen Boyle [email protected] Circulation Director Mark Irgang [email protected] Marketing Coordinator Lana Newlander [email protected] System Administrator Mitch Frazier [email protected] Webmaster Keith Daniels [email protected] Accountant Candy Beauchamp [email protected] Linux Journal is published by, and is a registered trade name of, Belltown Media, Inc. PO Box 980985, Houston, TX 77098 USA Editorial Advisory Board Daniel Frye, Director, IBM Linux Technology Center Jon “maddog” Hall, President, Linux International Lawrence Lessig, Professor of Law, Stanford University Ransom Love, Director of Strategic Relationships, Family and Church History Department, Church of Jesus Christ of Latter-day Saints Sam Ockman, CEO, Penguin Computing Bruce Perens Bdale Garbee, Linux CTO, HP Danese Cooper, Open Source Diva, Intel Corporation Advertising E-MAIL: [email protected] URL: www.linuxjournal.com/advertising PHONE: +1 713-344-1956 ext. 2 Subscriptions E-MAIL: [email protected] URL: www.linuxjournal.com/subscribe PHONE: +1 713-589-3503 FAX: +1 713-589-2677 TOLL-FREE: 1-888-66-LINUX MAIL: PO Box 980985, Houston, TX 77098 USA Please allow 4–6 weeks for processing address changes and orders PRINTED IN USA LINUX is a registered trademark of Linus Torvalds. letters Recognize This For people to invest their time and energy I’ve been more than getting my money’s in this, there would definitely need to be worth from LJ just from Dave Taylor’s Work a payoff to make it a worthwhile under- the Shell articles, but this month, my intro- taking. I think a much more promising duction to Tesseract doubled my pleasure approach would be a Linux port of exist- [“Tesseract: an Open-Source Optical ing instructional software. Character Recognition Engine” by Anthony Kay, July 2007]. I have been looking for an ChessMaster is indeed a very fine instruc- OCR program since I quit Microsoft seven tional package, and I highly recommend it years ago, and now I have one. Tesseract is to my students. Several years ago, I con- outstanding, and Anthony Kay did a great tacted Ubisoft regarding a Linux version of job with the article. ChessMaster. Unfortunately, the pre- -- dictable response was “not planned for Bruce Bales the foreseeable future”. Linux has gained a lot of traction since then, even in rela- Error Handling Instead tively small market niches like chess. of Ignoring I am writing regarding to the article A good example is one of the world’s “Writing Your Own Image Gallery strongest programs, Shredder Application with the UNIX Shell” by Girish (www.shredderchess.com), which has And Now for Something Venkatachalam, published in the July 2007 been made available for Linux. I also Completely Different issue of Linux Journal. happen to work as a consultant for a There is a nice Python tutorial in the June North American distributor and retailer 2007 issue [“Programming Python, Part I” In the script on page 71, Girish suppressed (www.chesscountry.com) of chess by José P. E. Fernandez]. It would be won- the mkdir error by redirecting the error