At the Forge - Firebug
which, on the Linux Journal home page, produces the following form header:
<form id="cvb_form" action="/" method="get">
Clicking on the code allows you to set a breakpoint (including a conditional breakpoint) to copy the function (useful when trying to communicate with other programmers or even when writing a column about programming) or to handle a breakpoint by continuing or stepping through the code.
Finally, the Net button makes it easy to keep track of any Ajax calls embedded in the page. Clicking on Net and XHR produces a graphical indication of the Ajax calls that have been made on this page, as well as how long each took to execute. If you are developing an Ajax application, this is the best way to find out where your bottlenecks are.
It's rare for me to call a product revolutionary, but I am sorely tempted to do so in the case of Firebug. It puts a lot of information in one nicely designed, easy-to-use package. The ability to interact with my packages has a vaguely Lisp-like feel, in that I'm suddenly interacting with a live environment. Firebug has given me the ability to “see” what my pages are doing and to better understand them.
Firebug has become an indispensable tool in my arsenal, alongside the Web Developer extension. In this way, Firefox is beginning to demonstrate that it is indeed a platform for Internet applications, rather than merely a Web browser.
Reuven M. Lerner, a longtime Web/database consultant, is a PhD candidate in Learning Sciences at Northwestern University in Evanston, Illinois. He currently lives with his wife and three children in Skokie, Illinois. You can read his Weblog at altneuland.lerner.co.il.
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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- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Tech Tip: Really Simple HTTP Server with Python
- Non-Linux FOSS: Caffeine!
- Managing Linux Using Puppet
- Doing for User Space What We Did for Kernel Space
- Rogue Wave Software's Zend Server
- 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