Investigate and solve problems with Nginx-powered websites using a deep understanding of the underlying principles About This Book * Solve problems with your Nginx-powered websites before your audience notices anything * Peek into the Nginx architecture and gain knowledge that will help you be valuable to you in the long run * Gain knowledge of different types of problems in a step-by-step way Who This Book Is For The book is for technical specialists who already use Nginx to serve web pages for their users. Whether you are an experienced system administrator or a new professional, this book will help you do your job in the most efficient way. What You Will Learn * Detect and investigate problems with your web servers * Create correct and professional configuration files * Get an in-depth understanding of the web server software * Interpret Nginx log files easily and with actionable insights * Make your websites respond as fast as possible * Prevent problems by setting up proper monitoring and alerts In Detail Nginx is clearly winning the race to be the dominant software to power modern websites. It is fast and open source, maintained with passion by a brilliant team. This book will help you maintain your Nginx instances in a healthy and predictable state. It will lead you through all the types of problems you might encounter as a web administrator, with a special focus on performance and migration from older software. You will learn how to write good configuration files and will get good insights into Nginx logs. It will provide you solutions to problems such as missing or broken functionality and also show you how to tackle performance issues with the Nginx server. A special chapter is devoted to the art of prevention, that is, monitoring and alerting services you may use to detect problems before they manifest themselves on a big scale. The books ends with a reference to error and warning messages Nginx could emit to help you during incident investigations. Style and approach This comprehensive tutorial on Nginx troubleshooting takes an practical approach to guiding you through common issues in Nginx server.

by David C Nagel In the last five years visualization has gone from the lab to become a desktop technology for many scientists. Images and 3-D renderings of data sets and mathematical models have evolved from the high-priced hardware and customized software of graphics professionals to low-cost, off-the-shelf commercial software running on personal computers. fu such, scientific visualization has taken its place beside mathematical modeling as an everyday means of interacting with one's data. This has significantly changed both the amount and the quality of information that scientists are able to extract from raw data, and has effectively established a new paradigm for scientific computing. In addi tion, new, low-cost hardware and software technologies such as CD-ROMs, digital video, and Apple's QuickTime time-based media of image and and compression technologies have enabled large amounts animation data to be easily accessible to the average researcher or teacher through the personal computer. However, little has been done in the way of providing a context within which the researcher or teacher could learn which approaches might be best suited for a given problem. Furthermore, most scientists are unfamiliar with the terminology and concepts in modern computer graphics, which simply steepens the learning curve for them to apply the new technologies to their work. fu a result, researchers and teachers are not yet taking full advantage of the new paradigm.

Leverage the capability of Banana Pi with exciting real-world projects About This Book * Delve into the expanse of Banana Pi's self-managing functionalities and develop real-world projects * Gain hands-on experience of developing various wireless, multimedia, robotic, and sensor-based applications with Banana Pi * Develop your applications using Banana Pi through a project-based approach Who This Book Is For This book is designed for those who are interested in exploring the capabilities of Banana Pro. Basic know-how of Linux and embedded systems would be an added advantage. What You Will Learn * Remotely connect to Banana Pro and program the embedded board * Use Banana Pro as a hotspot or provide an AirPlay server for wireless audio transmission * Find out about the different programming languages that can be used with Banana Pro * Build and program your own multimedia centre in order to watch television and movies * Connect peripherals such as a camera, LCD, or hard disk to Banana Pro * Manage and regulate your Linux system with Banana Pro * Stream music wirelessly from your mobile phone to Banana Pro In Detail This book follows a tactical plan that will guide you through the implementation of Banana Pro and its configurations. You will then learn the various programming languages used with Banana Pi with the help of examples. In no time at all, you'll be working on a wireless project that implements AirPlay servers, hotspots, and so on. Following this, you'll develop a retro-style arcade kiosk game. Then we'll move on to explore the multimedia features of Banana Pro by designing and building an enclosure for it. After this, you'll learn to build a remote-controlled smart car and we'll examine how to control a robotic arm. The book will conclude with the creation of a home sensor system that has the ability to expand or shrink to suit any home. Style and approach This book follows a project-based approach that covers the most important features of Banana Pro. Every chapter dives into the practical side of the implementation.

Transform your tiny Arduino device into a secret agent gadget to build a range of espionage projects with this practical guide for hackers About This Book * Discover the limitless possibilities of the tiny Arduino and build your own secret agent projects * From a fingerprint sensor to a GPS Tracker and even a robot- learn how to get more from your Arduino * Build nine secret agent projects using the power and simplicity of the Arduino platform Who This Book Is For This book is for Arduino programmers with intermediate experience of developing projects, and who want to extend their knowledge by building projects for secret agents. It would also be great for other programmers who are interested in learning about electronics and programming on the Arduino platform. What You Will Learn * Get to know the full range of Arduino features so you can be creative through practical projects * Discover how to create a simple alarm system and a fingerprint sensor * Find out how to transform your Arduino into a GPS tracker * Use the Arduino to monitor top secret data * Build a complete spy robot! * Build a set of other spy projects such as Cloud Camera and Microphone System In Detail Q might have Bond's gadgets- but he doesn't have an Arduino (not yet at least). Find out how the tiny Arduino microcomputer can be used to build an impressive range of neat secret agent projects that can help you go undercover and get to grips with the cutting-edge of the world of espionage with this book, created for ardent Arduino fans and anyone new to the powerful device. Each chapter shows you how to construct a different secret agent gadget, helping you to unlock the full potential of your Arduino and make sure you have a solution for every tricky spying situation. You'll find out how to build everything from an alarm system to a fingerprint sensor, each project demonstrating a new feature of Arduino, so you can build your expertise as you complete each project. Learn how to open a lock with a text message, monitor top secret data remotely, and even create your own Arduino Spy Robot, Spy Microphone System, and Cloud Spy Camera This book isn't simply an instruction manual - it helps you put your knowledge into action so you can build every single project to completion. Style and approach This practical reference guide shows you how to build various projects with step-by-step explanations on each project, starting with the assembly of the hardware, followed by basics tests of all those hardware components and finally developing project on the hardware.

Learn the fundamentals of vRealize Automation to accelerate the delivery of your IT services About This Book * Learn to install the vRealize Automation product in a distributed architecture using a load balancer * Plan backup and recovery strategies for every vRealize automation component * Use vRealize Automation to manage applications and improve operational efficiency using this simple and intuitive guide Who This Book Is For This book is for anyone who wants to start their journey with vRealize Automation. It is your one-stop instruction guide to installing and configuring a distributed setup using NSX load balancer. Regardless of whether or not you have used vRealize Automation before, following the steps provided in each chapter will get you started with the product. What You Will Learn * Understand the basic building blocks of vRealize Automation before embarking on the journey of installation * Familiarize yourself with the requirements and steps that need to be performed during the first phase of the distributed installation * Carry out a functional validation of the first phase of installation before completing the installation * Build a blueprint for vSphere endpoint, an essential step for a successful deployment of a service catalog * Create, configure, and deploy tenants, endpoints, blueprints, and the service catalog * Get to grips with the failover process for all components in vRealize Automation * Learn to configure the NSX loadbalancer for vRealize Orchestrator for high availability * Leverage ASD to develop XaaS (Anything as a Service) in vRealize Automation to deliver valuable competence In Detail With the growing interest in Software Defined Data Centers (SDDC), vRealize Automation offers data center users an organized service catalog and governance for administrators. This way, end users gain autonomy while the IT department stays in control, making sure security and compliance requirements are met. Learning what each component does and how they dovetail with each other will bolster your understanding of vRealize Automation. The book starts off with an introduction to the distributed architecture that has been tested and installed in large scale deployments. Implementing and configuring distributed architecture with custom certificates is unarguably a demanding task, and it will be covered next. After this, we will progress with the installation. A vRealize Automation blueprint can be prepared in multiple ways; we will focus solely on vSphere endpoint blueprint. After this, we will discuss the high availability configuration via NSX loadbalancer for vRealize Orchestrator. Finally, we end with Advanced Service Designer, which provides service architects with the ability to create advanced services and publish them as catalog items. Style and approach This book takes a step-by-step approach, is explained in a conversational and easy-to-follow style, and includes ample screenshots . Each topic is explained sequentially through planning, preparing, installing, configuring, and validating of all vRealize Automation's components.

Samsung Note 3 is not just a phone and not just a tablet either. If you are reading this user guide, you probably own it and don't know all there is about it. The Samsung Note 3 is loaded with features, which is what makes it so interesting. There's nothing you cannot do on your Samsung Note 3. From the basic to advanced features, you can operate your phone through voice control or with your palm without touching it Bet that's not the case in many other phones. Take clear and crisp pictures, draw sketches or edit images in the most exceptional way possible. Fun with your Samsung Note 3 cannot end. This user guide will provide you with all the information there is about Samsung Note 3. You will learn about: Key features of the phone Specifications of various functions Applications and features of Samsung Note 3 A step by step process to use the different features Visuals to easily understand the process and functions. And that's not it, you will also find: 100 tips and tricks which are sure to make the Samsung note 3 fun and easy to use

Harness the power of Nginx to make the most of your infrastructure and serve pages faster than ever About This Book * Discover possible interactions between Nginx and Apache to get the best of both worlds * Learn to exploit the features offered by NGinx for your web applications * Get the newest techniques available, designed with the latest version in mind Who This Book Is For By covering both the early setup stages and advanced topics, this book suits web administrators who interested in solutions to optimize their infrastructure, whether you are looking into replacing your existing web server software or integrating a new tool to cooperate with applications that are already up and running. If you, your visitors, and your operating system have been disappointed by Apache, this book is exactly what you need. What You Will Learn * Get to know the basics of the Nginx configuration: syntax, structure, and semantics * Understand the advanced load balancing functionality of Nginx and the newest innovative IO mechanisms * Create virtual host configurations effortlessly * Discover all the first-party modules: how to enable, configure, and use them * Establish advanced rewrite rules with the Nginx Rewrite module * Set up Nginx to work with PHP, Python, and more via FastCGI * Configure Nginx to work as frontend for your existing HTTP server * Manipulate configuration files with ease and adapt them to various situations * Discover the common pitfalls and find out how to avoid them In Detail Nginx is a lightweight HTTP server designed for high-traffic websites, with network scalability as the primary objective. With the advent of high speed Internet access, short loading times and fast transfer rates have become a necessity. This free, open source solution will either come as a full replacement of other software such as Apache, or stand in front of your existing infrastructure to improve its overall speed. This book is a detailed guide to setting up Nginx in different ways that correspond to actual production situations: as a standalone server, as a reverse proxy, interacting with applications via FastCGI, and more. In addition, this complete directive reference will be your best friend at all stages of the configuration and maintenance processes. This book is the perfect companion for both Nginx beginners and experienced administrators. For beginners, it will take you through the complete process of setting up this lightweight HTTP server on your system and configuring its various modules so it does exactly what you need quickly and securely. For more experienced administrators, this book provides different approaches that can help you make the most of your current infrastructure. Nginx can be employed in many situations, whether you are looking to construct an entirely new web-serving architecture or simply want to integrate an efficient tool to optimize your site loading speeds. Style and approach This tutorial-style book includes detailed instructions on each of the processes it describes, as well as step-by-step tutorials, commented configuration sections, and in-depth module descriptions, so you can make the most of the performance potential offered by Nginx.

Develop interactive Arduino-based Internet projects with Ethernet and WiFi About This Book * Build Internet-based Arduino devices to make your home feel more secure * Learn how to connect various sensors and actuators to the Arduino and access data from Internet * A project-based guide filled with schematics and wiring diagrams to help you build projects incrementally Who This Book Is For This book is intended for those who want to learn more about Arduino and make Internet-based interactive projects with Arduino. If you are an experienced software developer who understands the basics of electronics, then you can quickly learn how to build the Arduino projects explained in this book. What You Will Learn * Make a powerful Internet controlled relay with an embedded web server to monitor and control your home electrical appliances * Build a portable Wi-Fi signal strength sensor to give haptic feedback about signal strength to the user * Measure water flow speed and volume with liquid flow sensors and record real-time readings * Secure your home with motion-activated Arduino security cameras and upload images to the cloud * Implement real-time data logging of a solar panel voltage with Arduino cloud connectors * Track locations with GPS and upload location data to the cloud * Control a garage door light with your Twitter feed * Control infrared enabled devices with IR remote and Arduino In Detail Arduino is a small single-chip computer board that can be used for a wide variety of creative hardware projects. The hardware consists of a simple microcontroller, board, and chipset. It comes with a Java-based IDE to allow creators to program the board. Arduino is the ideal open hardware platform for experimenting with the world of the Internet of Things. This credit card sized Arduino board can be used via the Internet to make more useful and interactive Internet of things projects. Internet of Things with Arduino Blueprints is a project-based book that begins with projects based on IoT and cloud computing concepts. This book covers up to eight projects that will allow devices to communicate with each other, access information over the Internet, store and retrieve data, and interact with users-creating smart, pervasive, and always-connected environments. It explains how wired and wireless Internet connections can be used with projects and the use of various sensors and actuators. The main aim of this book is to teach you how Arduino can be used for Internet-related projects so that users are able to control actuators, gather data from various kinds of sensors, and send and receive data wirelessly across HTTP and TCP protocols. Finally, you can use these projects as blueprints for many other IoT projects and put them to good use. By the end of the book, you will be an expert in the use of IoT with Arduino to develop a set of projects that can relate very well to IoT applications in the real world. Style and approach Every chapter in this book clearly explains how to assemble components through easy-to-follow steps on while laying out important concepts, code snippets, and expected output results so that you can easily end up with a successful project where you can also enhance or modify the project according to your requirements.

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An overview of the most prominent contemporary parallel processing programming models, written in a unique tutorial style. With the coming of the parallel computing era, computer scientists have turned their attention to designing programming models that are suited for high-performance parallel computing and supercomputing systems. Programming parallel systems is complicated by the fact that multiple processing units are simultaneously computing and moving data. This book offers an overview of some of the most prominent parallel programming models used in high-performance computing and supercomputing systems today. The chapters describe the programming models in a unique tutorial style rather than using the formal approach taken in the research literature. The aim is to cover a wide range of parallel programming models, enabling the reader to understand what each has to offer. The book begins with a description of the Message Passing Interface (MPI), the most common parallel programming model for distributed memory computing. It goes on to cover one-sided communication models, ranging from low-level runtime libraries (GASNet, OpenSHMEM) to high-level programming models (UPC, GA, Chapel); task-oriented programming models (Charm++, ADLB, Scioto, Swift, CnC) that allow users to describe their computation and data units as tasks so that the runtime system can manage computation and data movement as necessary; and parallel programming models intended for on-node parallelism in the context of multicore architecture or attached accelerators (OpenMP, Cilk Plus, TBB, CUDA, OpenCL). The book will be a valuable resource for graduate students, researchers, and any scientist who works with data sets and large computations. Contributors Timothy Armstrong, Michael G. Burke, Ralph Butler, Bradford L. Chamberlain, Sunita Chandrasekaran, Barbara Chapman, Jeff Daily, James Dinan, Deepak Eachempati, Ian T. Foster, William D. Gropp, Paul Hargrove, Wen-mei Hwu, Nikhil Jain, Laxmikant Kale, David Kirk, Kath Knobe, Ariram Krishnamoorthy, Jeffery A. Kuehn, Alexey Kukanov, Charles E. Leiserson, Jonathan Lifflander, Ewing Lusk, Tim Mattson, Bruce Palmer, Steven C. Pieper, Stephen W. Poole, Arch D. Robison, Frank Schlimbach, Rajeev Thakur, Abhinav Vishnu, Justin M. Wozniak, Michael Wilde, Kathy Yelick, Yili Zheng

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This report is dedicated to looking at all sorts of tips and tricks that can be used on the Amazon Kindle Fire and Kindle Fire HD. These two digital readers can be used with several controls relating to how books are read, how people can go online and how their data can be protected. This report is arranged into several easy to use chapters to show you everything you can do with your reader. Everything in this guide is even divided to show you what you can use for individual activities. You can learn about how to play music files, convert files into formats that the Kindle Fire can use and even learn how to get third party applications onto the Kindle Fire. This is all arranged with a series of pictures of what you can do and a number of steps for each individual tip or trick. Be sure to refer to this guide often when taking a look at what you can do with your Kindle Fire.