On the Web - A Better Wireless Experience
A while ago, I had conversations with two of my least technically inclined friends, both of whom brought up the topic of Wi-Fi within minutes. In fact, one friend, a dancer and choreographer, called me specifically to ask what he could do with “the Wi-Fi thing in my laptop”. He'd bought a shiny new laptop on the recommendation of another friend and now was confessing to me that although he knew what Wi-Fi was theoretically, he wasn't sure what he could do with it.
Fast forward to the recent 4th of July weekend, when I spent time with these friends and found out they've both figured out a whole lot they can do with wireless. The choreographer told me he is working on-line with dancers on a new production. He's also collaborating with the cellist writing music for the piece. The cellist lives in San Diego, and my friend is doing most of this work while running around Seattle and hopping on any of the many hot spots he locates thanks to SeattleWireless.net. And, although certainly not the most important function that wireless technology ever served, without cell phones with IM features, my other friend and I never would have located each other among the 30,000+ people present at the fireworks display the evening of July 4th.
For those of you who've mastered IM and who are able to locate a hot spot blindfolded, the topic of this issue is Everything Wireless, and the LJ Web site offers even more project news, advice and how-tos. Take, for example, “Getting On-line Anywhere with Bluetooth and GPRS”, by Sreekrishan Venkiteswara (www.linuxjournal.com/article/7525). This article offers an overview of how BlueZ and General Packet Radio Service (GPRS) work and explains how they can be used when designing embedded Linux products, including cell phones and PDAs. Venkiteswara writes, “Because Bluetooth supports device inquiry and service discovery, the Bluetooth devices automatically can use a nearby cell phone for Internet connectivity, without cumbersome configuration of such details as physical addresses.”
In “A Linux-Based Implementation of Mobility Using SIP” (www.linuxjournal.com/article/7380), the developers explain how they created the “first open-source SIP implementation that supports mobility” by adding mobility capabilities to Vovida's VOCAL VoIP software. They write, “The software supports seamless SIP signaling when the user moves from network to network, as well as automatic handoff if the user is in the middle of a call while changing networks.”
On the end-user side, for those of you struggling with wireless connectivity for your laptop, be sure to check out the latest installment of Doc Searls' adventures with his new IBM T40 laptop, “The Laptopia Odyssey, Part 2” (www.linuxjournal.com/article/7636). A big part of this stage in creating Doc's ultimate mobile workstation is getting Wi-Fi to work as well and as consistently as he needs. Things improved once he switched to SuSE Professional 9.1 and made a few other changes, but it's still not perfect. He writes, “Kismet seems to work, so far. It sees 802.11b and b/g access points, two of each (three here, one next door). I still need to figure out how to get the ThinkPad to switch easily from one to another.” Doc also writes about using FireWire and the browser and office applications he likes best for his laptop.
If you're doing something new and interesting with wireless or if you've improved your wireless experience, why not share it with the rest of the Open Source community? Send me an article proposal at firstname.lastname@example.org.
Heather Mead is senior editor of Linux Journal.
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
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|The Firebird Project's Firebird Relational Database||Jul 29, 2016|
|Stunnel Security for Oracle||Jul 28, 2016|
|SUSE LLC's SUSE Manager||Jul 21, 2016|
|My +1 Sword of Productivity||Jul 20, 2016|
|Non-Linux FOSS: Caffeine!||Jul 19, 2016|
|Murat Yener and Onur Dundar's Expert Android Studio (Wrox)||Jul 18, 2016|
- The Firebird Project's Firebird Relational Database
- Stunnel Security for Oracle
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- SUSE LLC's SUSE Manager
- Managing Linux Using Puppet
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Parsing an RSS News Feed with a Bash Script
- Google's SwiftShader Released
- Doing for User Space What We Did for Kernel Space
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide