Current_Issue.tar.gz - Hack the Universe!
This month, we show you how to create black holes, swallow the Earth in a cloud of exotic matter, pummel the very fabric of space-time into nothingness and possibly even divide by zero. If you think you accidentally picked up a copy of Mad Scientist Monthly, fear not. Although I may have exaggerated the details a bit, it's still an exciting issue—the focus is “Hack This”.
Reuven M. Lerner starts things off with the notion that knowledge is power and provides a list of his favorite books for this year. Although my personal tastes lean a little more toward science fiction, Reuven has a great list of resources that should be on every mad scientist's, er, I mean programmer's shelf. Dave Taylor follows up with a solution to a frustrating problem: renaming files. It may seem like a simple thing, but anyone who ever has renamed thousands of files really appreciates the power of scripting. Dave shows how to do it.
The hacking issue certainly makes a few of us nervous, so security seems a wise topic to include this month. Mick Bauer helps us feel a bit more at ease with his continuing series on transparent firewalls. Jes Fraser also helps us test the security of our Web applications with her article on Samurai. Because Kyle Rankin just got back from DEF CON, we're all feeling a bit paranoid ourselves. It's nice that Mick and Jes have our back. Speaking of Kyle, unlike those Internet bad guys full of secrecy and evil, he's willing to share his knowledge with the rest of us. This month, he has a handful of useful hacks he learned while at DEF CON. If you want to stay off the “Wall of Sheep”, you'll want to check out his column.
What hacking issue would be complete without discussing the most complex fabricated system ever developed in the history of mankind? No, I don't mean Emacs keybindings, but rather the Large Hadron Collider, or LHC, over in Switzerland. What better way to analyze exotic particles than with open-source software! Carl Lundstedt takes us behind the scenes at CERN and shows how the data is getting crunched in that little-black-hole-creation factory.
If the LHC is a little too large for your hacking appetite, and at 17 miles in circumference, we certainly understand, perhaps Chinavision's Pico Projector is more your cup of tea. Kyle Rankin not only reviews the tiny embedded Linux device, but also covers how he hacked it—and bricked it. You'll have to read the details for yourself, but it's nice to see the elite run into trouble from time to time as well. Add to that Daniel Bartholomew's hack for finding his lost Nokia N900, and we have the small end of the device-hacking covered along with the big end.
For many of us, hacking is much more about programming than it is about soldering irons. Thankfully, Koen Vervloesem shows how to control our desktops with D-Bus. Whether you want to make applications talk to each other or tweak the way programs interact with humans, D-Bus is that back channel you can use to orchestrate the perfect desktop harmony. If you want to take it further and manipulate your computer remotely with a smartphone, Jamie Popkin walks through that process as well.
Things get a little more in-depth as Bryan Childs introduces Rockbox. Sure, most of us know Rockbox as the alternate operating system for a bunch of media-playing devices, but what many don't know is that although it's open source, it's not actually Linux. Why did we print such an article? Well, we figured this month we'd hack your expectations a bit too. Anyone interested in Linux will likely be interested in Rockbox. Check out Bryan's article and see for yourself.
This issue is bound to push you over the edge from intelligent Linux user to evil genius. At the very least, it will help prepare you for a battle against the bad guys. We hope you enjoy the Hack This issue; we definitely enjoyed putting it together for you.
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!
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- Interview with Patrick Volkerding
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Non-Linux FOSS: Caffeine!
- SuperTuxKart 0.9.2 Released
- Tech Tip: Really Simple HTTP Server with Python
- Parsing an RSS News Feed with a Bash Script
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