From the Editor - A Spectrum of Great Projects
Put “wireless” and “Linux” on the cover of the same magazine, and people are going to expect 802.11b, or Wi-Fi, networking. We won't disappoint you, as our master chef, Marcel Gagné, covers some desktop tools that you can use to manage your wireless connections (page 24).
Also on the desktop, if you're tuning in to satellite radio and want to control the receiver from Linux, you're in luck. Michael J. Hammel has a friendly GUI app for you. Follow along and learn how you can modify it or write your own applications (page 78).
We got a lot of positive response to Eric Blossom's introduction to software radio in our June 2004 issue. People want a beginner's software radio project to do, so Eric generously developed and wrote up the FM receiver on page 42. Even if you missed the first article, this one will have you listening to FM stations with software. You need a signal for testing, so now corporate radio finally will be worthwhile for someone other than the three Eagles fans who don't have a copy of “Hotel California” and the one guy who wants to buy a Toyota but doesn't know where the dealer is. Once you get started, there are plenty more projects to explore in software radio, so keep in touch when you invent something.
Ian McLoughlin and Tom Scott are quietly inventing a new RF communications mode, with the help of a Linux cluster, Linux FPGA tools and more. See how a modern engineering lab works with Linux on page 36 and get some ideas.
If you're a radio ham, and a little disappointed with the lack of OS diversity in the mainstream amateur radio magazines, you're sure to enjoy Volker Schroer's intro to PSK31 under Linux on page 50. In the early days of LJ, we had a lot of ham readers, so write in if you want more on amateur radio.
Not that ham radio isn't plenty educational and community-building, but radio amateurs settled for a bad deal with governments when radio regulation came into effect, nailed down in the US with the Radio Act of 1927. Amateurs were forbidden to broadcast music, news or general-interest programs. Hams in the 1920s put concerts and sports events on the air but found themselves relegated to talking about—well, mostly about radios. For details, see Bill Continelli's “History of Amateur Radio” on ham-shack.com.
What could have been the first peer-to-peer media went silent. Don't let it happen to new technologies—no matter how tempting it is to want to regulate spam, viruses or “bad software”, doing so could mean we'll wake up to find that all our favorite community Web sites can talk only about Cascading Style Sheets.
Whether you simply want a control panel for Wi-Fi and better music selection via satellite radio, or you're ready to break out the soldering iron and invent a whole new application for software radio, there's plenty to learn and enjoy in this issue. Have fun and see you next month.
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!
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- SUSE LLC's SUSE Manager
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- Non-Linux FOSS: Caffeine!
- Tech Tip: Really Simple HTTP Server with Python
- SuperTuxKart 0.9.2 Released
- Doing for User Space What We Did for Kernel Space
- Parsing an RSS News Feed with a Bash Script
- Google's SwiftShader Released
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