New Products
The hardworking community of developers and users of open-source geographic information systems (GISes) is sorely underserved, so it's fortunate to see the new Manning publication PostGIS in Action by Regina Obe and Leo Hsu. PostGIS in Action is the first book devoted entirely to PostGIS, a freely available open-source spatial database extender, which can answer questions beyond those possible with a mere relational database. PostGIS' feature set equals or surpasses proprietary alternatives, allowing for the creation of location-aware queries and features with just a few lines of SQL code. Readers with experience in relational databases will find a background in vector-based GIS that enables quick ramp-up to analyzing, viewing and mapping data. The advanced will learn how to optimize queries for maximum speed, simplify geometries for greater efficiency and create custom functions suited specifically to their applications.
Opera Software's Opera Dragonfly is a new suite of open-source debugging tools for Web developers and designers that got its name because “it eats bugs”. The suite covers the full debugging work flow, from inspecting network access and downloaded resources to correcting JavaScript issues and seeing how CSS rules apply to the DOM. Opera Dragonfly supports all the newest Web technologies, including SVG and HTML5 APIs, such as Web Storage. Product benefits, sayeth Opera, include a superior JavaScript debugger, a network inspector to discover why a site “turns to molasses” and a storage inspector to uncover how a site handles the data it collects. Opera Dragonfly loads automatically when one downloads the Opera browser.
The advent of the digital camera has truly transformed photography and made it more accessible to all, especially us geeks. Although we geeks might be good at manipulating images with The GIMP and organizing them with digiKam, we may not be proficient at the mechanics of good exposure, a requirement that has not changed with digital photography. Enter the new book Capture: Digital Photography Essentials, written by Glenn Rand, Chris Broughton and Amanda Quintenz-Fiedler. The text addresses both the opportunities and limitations of digital photography, and how to work with those opportunities and around the limitations. Readers will learn to maximize the potential of their images through an understanding of the core principles and more advanced aspects of the digital photographic process.
One of your more direct routes to the cloud is by hopping a ride onto Cloud.com's CloudStack open-source cloud computing platform, now in version 2.2. CloudStack, says Cloud.com, is a comprehensive, open-source software solution that accelerates the deployment, management and configuration of highly scalable, public or private infrastructure as a service clouds. Data-center operators can build cloud services within their existing infrastructure to offer on-demand, elastic cloud services. Version 2.2 of CloudStack offers features such as improved hypervisor support (VMware vSphere 4, Citrix XenServer 5.6 and KVM), advanced networking configuration, an AJAX Web interface and borderless scalability. The federation of managed and hosted availability zones can be managed within a single CloudStack deployment. The new CloudBridge feature enables applications to interoperate with other cloud solutions including Amazon EC2 and S3 APIs, as well as the upcoming OpenStack API. CloudStack is available for immediate download.
Keeping our heads in the clouds, let's take note of another cloud-based platform, the Logicalis Enterprise Power Cloud for IBM Power 770 Systems. The solution is for IBM users who require more than Windows and Linux support. It provides a “data center in the sky” with all the capabilities found in on-premises data centers and more. Key benefits include support for AIX and i5/OS, enterprise-class management skills for legacy systems, flexible computing capacity, lower infrastructure and maintenance costs, elasticity to respond to changing business needs, 24x7 monitoring and management, and reduced carbon footprint and energy consumption.
James Gray is Products Editor for Linux Journal
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
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Every security policy provides guidance and requirements for ensuring adequate protection of information and data, as well as high-level technical and administrative security requirements for a system in a given environment. Traditionally, providing security for a system focuses on the confidentiality of the information on it. However, protecting the data integrity and system and data availability is just as important. For example, when processing United States intelligence information, there are three attributes that require protection: confidentiality, integrity, and availability.
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| Designing Electronics with Linux | May 22, 2013 |
| Dynamic DNS—an Object Lesson in Problem Solving | May 21, 2013 |
| Using Salt Stack and Vagrant for Drupal Development | May 20, 2013 |
| Making Linux and Android Get Along (It's Not as Hard as It Sounds) | May 16, 2013 |
| Drupal Is a Framework: Why Everyone Needs to Understand This | May 15, 2013 |
| Home, My Backup Data Center | May 13, 2013 |
- Designing Electronics with Linux
- Making Linux and Android Get Along (It's Not as Hard as It Sounds)
- Dynamic DNS—an Object Lesson in Problem Solving
- Using Salt Stack and Vagrant for Drupal Development
- New Products
- Build a Skype Server for Your Home Phone System
- Validate an E-Mail Address with PHP, the Right Way
- A Topic for Discussion - Open Source Feature-Richness?
- Why Python?
- Tech Tip: Really Simple HTTP Server with Python
Enter to Win an Adafruit Pi Cobbler Breakout Kit for Raspberry Pi

It's Raspberry Pi month at Linux Journal. Each week in May, Adafruit will be giving away a Pi-related prize to a lucky, randomly drawn LJ reader. Winners will be announced weekly.
Fill out the fields below to enter to win this week's prize-- a Pi Cobbler Breakout Kit for Raspberry Pi.
Congratulations to our winners so far:
- 5-8-13, Pi Starter Pack: Jack Davis
- 5-15-13, Pi Model B 512MB RAM: Patrick Dunn
- 5-21-13, Prototyping Pi Plate Kit: Philip Kirby
- Next winner announced on 5-27-13!
Free Webinar: Hadoop
How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Some of key questions to be discussed are:
- What is the “typical” Hadoop cluster and what should be installed on the different machine types?
- Why should you consider the typical workload patterns when making your hardware decisions?
- Are all microservers created equal for Hadoop deployments?
- How do I plan for expansion if I require more compute, memory, storage or networking?




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