From the Editor - Wireless Networking
How about a project that combines hardware construction, community building, network hacking and, of course, Linux and other free software? Best of all, the stuff you need to get started is cheap and standardized, and there's a great balance of helpful resources and unanswered questions. We're talking about wireless networks. You'll impress even people who aren't Linux users by offering convenient Net access at your business or organization and the public spaces nearby.
Here on the West Coast of the USA, people sometimes get complacent about being first to understand and deploy new technology. If you're in San Francisco or Seattle, you're bound to be living a couple years ahead of everyone else, gadget-wise, right? Wrong.
Even though the West Coast has some wireless users groups that have done some impressive work, wireless is really making an impact in New York City, where “business improvement districts” are using access points to improve business in their neighborhoods, and even the phone company is offering access points. NYCwireless is a force to be reckoned with and might give you some ideas for your town. Find out exactly what that beat box on the cover has to do with Linux, and learn about the wireless frenzy sweeping New York City, on page 42.
When Doc's article has you typing “LGA” into your favorite travel site, be sure to pack your favorite Linux PDA or laptop, and bring along a copy of Kismet. Tony Steidler-Dennison shows you how to discover all the wireless resources available to you, on page 58.
Meanwhile, the author of Kismet, Mike Kershaw, explains how to set up your very own access point, with NoCatAuth and a friendly login screen for security, on page 52. If you merely leave your access point open, people might hesitate to use it because they're polite or don't know what your intentions are. Change its name to something with “public” or “open” in it, and put up NoCatAuth so that people can sign in and understand the terms under which they're allowed to use it.
As always, networks are most useful and fun when you can connect them to real-world devices. Tad Truex has a sump pump on the Web, and you can learn to hook up your own electrical appliances on page 38. Remember, safety first, and read the part about not burning your house down.
Often, you need a big directory that handles everyone's information for your business, and the last thing you want is to get locked in to some vendor's idea of how to do it, so naturally you've been reading Mick Bauer's series on OpenLDAP. This month, on page 32, Mick finishes the series. If you're a new subscriber, check out interactive.linuxjournal.com for the previous two articles in the series.
Finally, don't miss the chance to get your Web site onto a content management system (CMS) that helps everyone do his or her job better and release pages to the public at the right time. Reuven Lerner offers Bricolage for your consideration on page 16.
Don Marti is editor in chief of Linux Journal.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
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.
Free to Linux Journal readers.Register Now!
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- SourceClear Open
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