Current_Issue.tar.gz - Pocket-Sized Penguins
When my kids were young, it was difficult for me to convince them that penguins were birds. Frankly, they don't look much like birds. They don't exactly sit on bird feeders. Heck, they don't even fly. When they are waddling around in the snow, penguins look gangly and awkward. It's not until you see them in the water that their beauty and elegance really shines. Although I'm not suggesting Linux is awkward, there are some environments in which it really shines. Mobile devices are one of them.
This month, we're covering the whole gamut of mobile Linux. Alexander Sirotkin shows us how to bend Google Android to our will with the Java API. Marcel Gagné shows us a bit about syncing data from our non-Linux BlackBerry handsets with our Linux desktops. Most smartphones lack native Linux software, but thankfully, Funambol fills that gap nicely and supports many different mobile devices. If you have a smartphone, you'll want to check it out.
One of the frustrations of using mobile Linux devices is that the screens (if they have one) are really small. David Harding shows us the nuances of the Conkeror Web browser on small screens. Thankfully, more and more Web sites are being designed for the mobile-sized browser, but a flexible browser still is a great asset on tiny screens. Heck, with Linux, mobile computing doesn't even need screens. Federico Lucifredi shows us how to hack the Western Digital MyBook II. With a little bit of work, you'll be able to take your own Linux server with you wherever you go. Throw a couple in your backpack, and you could be a mobile cloud!
I was sure that for the mobile issue, Kyle Rankin would tell us about the time he did system administration on his server farm from a beach somewhere in Mexico with nothing more than an SSH prompt on his BlackBerry. I may have been wrong with my guess, but Kyle doesn't disappoint this month. He deals with the horrible mistake many of us have made: typing a command remotely into the wrong server. As someone who accidentally has typed his password in an instant message window to someone by mistake, I'd advise reading his column. Twice.
Daniel Bartholomew is back this month to show us Kindle 2. The differences between that and the new Kindle DX are fairly easy to see (basically, it's huge). But, there are some significant differences between the original Kindle and the new regular-sized model too. Daniel compares the two and explains the pros, cons and general interesting things Amazon is offering in its Linux-based devices. If music or audio is more interesting than reading to you, Dan Sawyer tells us all about Indamixx, a recording studio you can take with you on the go. There may be some inappropriate places to set up your mobile studio, but with Indamixx, the problem won't be portability.
Fear not; this month we still have our regular lineup of columns to scratch that geeky itch. Dave Taylor demonstrates using getopt in shell scripts to parse the start flags. Reuven M. Lerner shows us how to check our Ruby code with metric_fu, and Mick Bauer continues his series on building a secure Squid proxy. This issue focuses on mobile Linux, but as with every other month, we aim to please everyone.
I suppose Linux Journal itself is a good example of mobility. Feel free to take this issue with you wherever you go. If you subscribe to the digital edition, you might be reading this on a laptop right now. My only suggestion would be that regardless of which format you are reading, try not to get carried away. Penguins might be able to “fly” underwater, but unless you have a Linux-powered submarine, Linux Journal is best enjoyed on dry ground.
Shawn Powers is the Associate Editor for Linux Journal. He's also the Gadget Guy for LinuxJournal.com, and he has an interesting collection of vintage Garfield coffee mugs. Don't let his silly hairdo fool you, he's a pretty ordinary guy and can be reached via e-mail at email@example.com. Or, swing by the #linuxjournal IRC channel on Freenode.net.
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!
- SUSE LLC's SUSE Manager
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- Non-Linux FOSS: Caffeine!
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Google's SwiftShader Released
- Parsing an RSS News Feed with a Bash Script
- LiveCode Ltd.'s LiveCode
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