Editors' Choice Awards
Neither of our two choices for best graphics application even has a GUI interface. Sometimes you need to script something, and converting any unlicensed GIFs you may have lying around to the legal PNG format is one of those times.
gif2png includes a script to grovel through your entire site and expunge the GIFs once and for all. And, some software creates oversized PNGs when you “save as PNG”, and pngcrush can go back and do it right.
There is a large selection of backup tools for Linux, and we're glad, because it makes it easier to back up your new Linux box where the Powers that Be have already chosen the backup software to be used.
At Linux Journal though, we run Amanda. We can get whatever software we want at no charge because software companies give us copies to butter us up. But our sysadmin team chose Amanda, which stands for “Advanced Maryland Automatic Network Disk Archiver”. There's an unrelated project called Amanda at Berkeley, so be sure not to install the wrong software—the Berkeley Amanda is the Antarctic Muon and Neutrino Detector Array, and you don't want to find yourself with a bunch of muon-tracking data instead of backups of your files.
Amanda is classic, old-school free software—infinitely configurable, not fancy, but reliable. It takes a while to learn and set up, but once you've got it configured the way you want, it should be trouble-free.
In an earlier article we wrote, “Jabber is built so wide open that it's hard to see the limits of what can be done with it.” And we like the “explosive combination” of XML and instant messaging. With Jabber, any two identities, whether human or machine, can send and receive real-time messages that contain pretty much anything and can do so in a structured way, independent, if necessary, of intermediating protocols. Jabber is going to be the basis of some fun applications.
Think of Blender as the planter for the render farm—it's the application that lets you design 3-D scenes. But fire it up and you'll quickly realize that Blender is no Xpaint. This is some heavy software and takes a real-time investment to learn. But we judge a tree by its fruits, and digital art produced with Blender is pretty impressive.
Tim Perdue, a well-known PHP wizard, explained the benefits of using PostgreSQL as a back-end database for his web projects: “To start, we will make use of Postgres' SELECT...FOR UPDATE syntax, which effectively locks selected rows so you can update them and commit your changes within a transaction.”
And, he adds, “With some databases, like MySQL, you can't easily lock specific rows of data to prevent other processes from decrementing the inventory while you are also trying to decrement the inventory. What you wind up with is inaccurate numbers and a useless inventory count.” Now, we can't have that. If your e-commerce site sells the last Furby twice, you're in big trouble.
For “big-database” features and the configurability and administration advantages of open source, we give PostgreSQL a big thumbs-up.
If you invest your time and money in a computer game, you want to see people suffer when you shoot them, right? Anatomically correct gunshot wounds. Screams of agony. Simplistic plot. Put it all together and what do you get? Hours of fun, that's what.
Weak stomach? Try GNOME Freecell.
We must confess something right now. Here at Linux Journal, we're just not big office suite users. We basically get by with vi until we send articles to layout, and when someone sends us a proprietary-format document, we just trash it and add them to the bozo list. But every once in a while, in our personal lives, we have to do up a batch of anti-DMCA flyers or something. For that, there's StarOffice. A bit on the hoggish side, but it gets the job done. And we'll buy beers for Sun people at the next Linux show—thank you for putting the new version under the GPL.
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
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- Managing Linux Using Puppet
- Control Your Linux Desktop with D-Bus
- Download "Linux Management with Red Hat Satellite: Measuring Business Impact and ROI"
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- 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