Understanding SQL's underlying theory is the best way to guarantee that your SQL code is correct and your database schema is robust and maintainable. On the other hand, if you're not well versed in the theory, you can fall into several traps. In SQL and Relational Theory, author C.J. Date demonstrates how you can apply relational theory directly to your use of SQL. With numerous examples and clear explanations of the reasoning behind them, you'll learn how to deal with common SQL dilemmas, such as:Should database access granted be through views instead of base tables? Nulls in your database are causing you to get wrong answers. Why? What can you do about it? Could you write an SQL query to find employees who have never been in the same department for more than six months at a time? SQL supports "quantified comparisons," but they're better avoided. Why? How do you avoid them? Constraints are crucially important, but most SQL products don't support them properly. What can you do to resolve this situation? Database theory and practice have evolved since Edgar Codd originally defined the relational model back in 1969. Independent of any SQL products, SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of the material available anywhere. Anyone with a modest to advanced background in SQL will benefit from the many insights in this book.  

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Knoppix is a portable Linux distribution replete with hundreds of valuable programs and utilities -- a veritable Swiss Army knife in bootable CD form. It includes Linux software and desktop environments, automatic hardware detection and hundreds of other quality open source programs. Whether you re a system administrator or power user, you can use Knoppix for many different purposes. Knoppix boots and runs completely from a single CD so you don t need to install anything to your hard drive. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it. What you do need, however, is a comprehensive reference guide so you can benefit from all that Knoppix has to offer. The Knoppix Pocket Reference from O Reilly fits the bill. This handy book shows you how to use Knoppix to troubleshoot and repair your computer, how to customize the Knoppix CD, running RAM memory checks, recovering data from a damaged hard drive, cloning hard drives, using Knoppix as a Terminal Server, using Knoppix as a kiosk OS, scanning for viruses on a Windows system, editing the Registry of a Windows system, and much more. If you want more information than the average Knoppix user, Knoppix Pocket Reference is an absolutely essential addition to your personal library.  

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Knoppix is a portable Linux distribution replete with hundreds of valuable programs and utilities -- a veritable Swiss Army knife in bootable CD form. It includes Linux software and desktop environments, automatic hardware detection and hundreds of other quality open source programs. Whether you're a system administrator or power user, you can use Knoppix for many different purposes. Knoppix boots and runs completely from a single CD so you don't need to install anything to your hard drive. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it. What you do need, however, is a comprehensive reference guide so you can benefit from all that Knoppix has to offer. The Knoppix Pocket Reference from O'Reilly fits the bill. This handy book shows you how to use Knoppix to troubleshoot and repair your computer, how to customize the Knoppix CD, running RAM memory checks, recovering data from a damaged hard drive, cloning hard drives, usin  

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Note: This book is now out of print. A Kindle version published by the author is available from Amazon. For other digital formats (PDF, EPUB, etc), please visit feistyduck.com.With more than 67% of web servers running Apache, it is by far the most widely used web server platform in the world. Apache has evolved into a powerful system that easily rivals other HTTP servers in terms of functionality, efficiency, and speed. Despite these impressive capabilities, though, Apache is only a beneficial tool if it's a secure one.To be sure, administrators installing and configuring Apache still need a sure-fire way to secure it--whether it's running a huge e-commerce operation, corporate intranet, or just a small hobby site.Our new guide, Apache Security, gives administrators and webmasters just what they crave--a comprehensive security source for Apache. Successfully combining Apache administration and web security topics, Apache Security speaks to nearly everyone in the field. What's more, it offers a concise introduction to the theory of securing Apache, as well as a broad perspective on server security in general.But this book isn't just about theory. The real strength of Apache Security lies in its wealth of interesting and practical advice, with many real-life examples and solutions. Administrators and programmers will learn how to:install and configure Apache prevent denial of service (DoS) and other attacks securely share servers control logging and monitoring secure custom-written web applications conduct a web security assessment use mod_security and other security-related modules And that's just the tip of the iceberg, as mainstream Apache users will also gain valuable information on PHP and SSL/ TLS. Clearly, Apache Security is packed and to the point, with plenty of details for locking down this extremely popular and versatile web server.  

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jQuery simplifies building rich, interactive web frontends. Getting started with this JavaScript library is easy, but it can take years to fully realize its breadth and depth; this cookbook shortens the learning curve considerably. With these recipes, you'll learn patterns and practices from 19 leading developers who use jQuery for everything from integrating simple components into websites and applications to developing complex, high-performance user interfaces. Ideal for newcomers and JavaScript veterans alike, jQuery Cookbook starts with the basics and then moves to practical use cases with tested solutions to common web development hurdles. You also get recipes on advanced topics, such as methods for applying jQuery to large projects.Solve problems involving events, effects, dimensions, forms, themes, and user interface elements Learn how to enhance your forms, and how to position and reposition elements on a page Make the most of jQuery's event management system, including custom events and custom event data Create UI elements-such as tabs, accordions, and modals-from scratch Optimize your code to eliminate bottlenecks and ensure peak performance Learn how to test your jQuery applications The book's contributors include:Cody Lindley James Padolsey Ralph Whitbeck Jonathan Sharp Michael Geary and Scott González Rebecca Murphey Remy Sharp Ariel Flesler Brian Cherne Jörn Zaefferer Mike Hostetler Nathan Smith Richard D. Worth Maggie Wachs, Scott Jehl, Todd Parker, and Patty Toland Rob Burns  

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The Linux Security Cookbook includes real solutions to a wide range of targeted problems, such as sending encrypted email within Emacs, restricting access to network services at particular times of day, firewalling a webserver, preventing IP spoofing, setting up key-based SSH authentication, and much more.With over 150 ready-to-use scripts and configuration files, this unique book helps administrators secure their systems without having to look up specific syntax. The book begins with recipes devised to establish a secure system, then moves on to secure day-to-day practices, and concludes with techniques to help your system stay secure. This cookbook s proven techniques are derived from hard-won experience. Whether you re responsible for security on a home Linux system or for a large corporation, or somewhere in between, you ll find valuable, to-the-point, practical recipes for dealing with everyday security issues.  

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When you're working with CSS and need a quick answer, CSS Pocket Reference delivers. This handy, concise book provides all of the essential information you need to implement CSS on the fly. Ideal for intermediate to advanced web designers and developers, the 4th edition is revised and updated for CSS3, the latest version of the Cascading Style Sheet specification. Along with a complete alphabetical reference to CSS3 selectors and properties, you'll also find a short introduction to the key concepts of CSS. Based on Cascading Style Sheets: The Definitive Guide, this reference is an easy-to-use cheatsheet of the CSS specifications you need for any task at hand. This book helps you:Quickly find and adapt the style elements you need Learn how CSS3 features complement and extend your CSS practices Discover new value types and new CSS selectors Implement drop shadows, multiple backgrounds, rounded corners, and border images Get new information about transforms and transitions  

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Designing Interfaces captures UI best practices as design patterns--solutions to common design problems, tailored to the situation at hand. The updated edition includes patterns for mobile apps, social networks, and search interfaces, as well as Web applications and desktop software.  

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As Linux continues to grow in market share as an enterprise operating system, system administrators need to solve problems in a wide range of applications and work environments. To help you get to the bottom of real-life problems quickly, Linux System Administration is organized around three common administration scenarios: Linux as a hub for a home or small office, Linux as LAMP system (Linux-Apache web server-MySQL database- PHP/Perl/Python scripting languages), and remote administration of Linux machines. You will be able to move beyond the basics of individual Linux tools in order to competently support users and maintain systems in actual work environments. Linux System Administration provides a solid background for Linux desktop users who want to move beyond the basics of Linux, and for experienced system administrators who are looking to gain more advanced skills.  

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There are many reasons for serving up dynamic content from a web site: to offer an online shopping site, create customized information pages for users, or just manage a large volume of content through a database. Anyone with a modest knowledge of HTML and web site management can learn to create dynamic content through the PHP programming language and the MySQL database. This book gives you the background and tools to do the job safely and reliably.Web Database Applications with PHP and MySQL, Second Edition thoroughly reflects the needs of real-world applications. It goes into detail on such practical issues as validating input (do you know what a proper credit card number looks like?), logging in users, and using templates to give your dynamic web pages a standard look.But this book goes even further. It shows how JavaScript and PHP can be used in tandem to make a user's experience faster and more pleasant. It shows the correct way to handle errors in user input so that a site looks professional. It introduces the vast collection of powerful tools available in the PEAR repository and shows how to use some of the most popular tools.Even while it serves as an introduction to new programmers, the book does not omit critical tasks that web sites require. For instance, every site that allows updates must handle the possibility of multiple users accessing data at the same time. This book explains how to solve the problem in detail with locking.Through a sophisticated sample application--Hugh and Dave's Wine Store--all the important techniques of dynamic content are introduced. Good design is emphasized, such as dividing logic from presentation. The book introduces PHP 5 and MySQL 4.1 features, while providing techniques that can be used on older versions of the software that are still in widespread use.This new edition has been redesigned around the rich offerings of PEAR. Several of these, including the Template package and the database-independent query API, are fully integrated into examples and thoroughly described in the text. Topics include:Installation and configuration of Apache, MySQL, and PHP on Unix®, Windows®, and Mac OS® X systems Introductions to PHP, SQL, and MySQL administration Session management, including the use of a custom database for improved efficiency User input validation, security, and authentication The PEAR repository, plus details on the use of PEAR DB and Template classes Production of PDF reports  

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Getting Microsoft Windows Server 2003 up and running, either as a standalone or as part of a multi-site, multi-server network is a formidable task for anyone. O Reilly s no-nonsense guide, Learning Windows Server 2003, 2nd Edition, gives you just what you need to get the job done. It provides you with the nuts and bolts for installing, configuring, securing, and managing Windows Server 2003-plus, it has been completely updated for Service Pack 1 and release R2. Learning Windows Server 2003, 2nd Edition includes just enough theory for you to understand how the different features and systems work in this latest version of Windows. You ll come away with a firm understanding of what s happening under the hood of the system, but without feeling like you re taking a graduate course in OS theory. After its high-level overview, the book offers complete discussions and treatments of all of Server 2003 s major components. You ll learn how to: install Windows Server 2003 create and manage user accounts (with particular attention to Active Directory) manage access to system resources, such as printers and files configure and manage its numerous major subsystems The book also features step-by-step procedures and discussions of complex concepts such as patch management, Active Directory replication, DFS namespaces and replication, network access quarantining, server clustering, Group Policy and other security tools, and IIS6 web server. Whether you re an experienced system administrator or one who s just beginning, you ll turn to this practical guide again and again when you need to understand the massive product that is Windows Server 2003.  

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Open source software is changing the world of Information Technology. But making it work for your company is far more complicated than simply installing a copy of Linux. If you are serious about using open source to cut costs, accelerate development, and reduce vendor lock-in, you must institutionalize skills and create new ways of working. You must understand how open source is different from commercial software and what responsibilities and risks it brings. Open Source for the Enterprise is a sober guide to putting open source to work in the modern IT department. Open source software is software whose code is freely available to anyone who wants to change and redistribute it. New commercial support services, smaller licensing fees, increased collaboration, and a friendlier platform to sell products and services are just a few of the reasons open source is so attractive to IT departments. Some of the open source projects that are in current, widespread use in businesses large and small include Linux, FreeBSD, Apache, MySQL, PostgreSQL, JBOSS, and Perl. These have been used to such great effect by Google, Amazon, Yahoo!, and major commercial and financial firms, that a wave of publicity has resulted in recent years, bordering on hype. Large vendors such as IBM, Novell, and Hewlett Packard have made open source a lynchpin of their offerings. Open source has entered a new area where it is being used as a marketing device, a collaborative software development methodology, and a business model. This book provides something far more valuable than either the cheerleading or the fear-mongering one hears about open source. The authors are Dan Woods, former CTO of TheStreet.com and a consultant and author of several books about IT, and Gautam Guliani, Director of Software Architecture at Kaplan Test Prep & Admissions. Each has used open source software for some 15 years at IT departments large and small. They have collected the wisdom of a host of experts from IT departments, open source communities, and software companies. Open Source for the Enterprise provides a top to bottom view not only of the technology, but of the skills required to manage it and the organizational issues that must be addressed. Here are the sorts of questions answered in the book: Why is there a "productization gap" in most open source projects? How can the maturity of open source be evaluated? How can the ROI of open source be calculated? What skills are needed to use open source? What sorts of open source projects are appropriate for IT departments at the beginner, intermediate, advanced, and expert levels? What questions need to be answered by an open source strategy? What policies for governance can be instituted to control the adoption of open source? What new commercial services can help manage the risks of open source? Do differences in open source licenses matter? How will using open source transform an IT department? Praise for Open Source for the Enterprise: "Open Source has become a strategic business issue; decisions on how and where to choose to use Open Source now have a major impact on the overall direction of IT abilities to support the business both with capabilities and by controlling costs. This is a new game and one generally not covered in existing books on Open Source which continue to assume that the readers are 'deep dive' technologists, Open Source for the Enterprise provides everyone from business managers to technologists with the balanced view that has been missing. Well worth the time to read, and also worth encouraging others in your enterprise to read as well." ----Andy Mulholland - Global CTO Capgemini "Open Source for the Enterprise is required reading for anyone working with or looking to adopt open source technologies in a corporate environment. Its practical, no-BS approach will make sure you're armed with the information you need to deploy applications successfully (as well as helping you know when to say "no"). If you'  

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Want to add more interactivity and polish to your websites? Discover how jQuery can help you build complex scripting functionality in just a few lines of code. With Head First jQuery, you ll quickly get up to speed on this amazing JavaScript library by learning how to navigate HTML documents while handling events, effects, callbacks, and animations. By the time you ve completed the book, you ll be incorporating Ajax apps, working seamlessly with HTML and CSS, and building your own plug-ins. If you want to learn--and understand--how to create interactive web pages, unobtrusive script, and cool animations that don t kill your browser, this book is for you.Use jQuery with DOM to overcome the limitations of HTML and CSS Learn how jQuery selectors and actions work together Write functions and wire them to interface elements Use jQuery effects to create actions on the page Make your pages come alive with animation Learn how use jQuery with the new HTML5 elements Build interactive web pages with jQuery and Ajax Create plug-ins to handle reusable functions Build forms and reports in web applications  

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Squid is the most popular Web caching software in use today, and it works on a variety of platforms including Linux, FreeBSD, and Windows. Squid improves network performance by reducing the amount of bandwidth used when surfing the Web. It makes web pages load faster and can even reduce the load on your web server. By caching and reusing popular web content, Squid allows you to get by with smaller network connections. It also protects the host on your internal network by acting as a firewall and proxying your internal web traffic. You can use Squid to collect statistics about the traffic on your network, prevent users from visiting inappropriate web sites at work or school, ensure that only authorized users can surf the Internet, and enhance your privacy by filtering sensitive information from web requests. Companies, schools, libraries, and organizations that use web-caching proxies can look forward to a multitude of benefits.Written by Duane Wessels, the creator of Squid, Squid: The Definitive Guide will help you configure and tune Squid for your particular situation. Newcomers to Squid will learn how to download, compile, and install code. Seasoned users of Squid will be interested in the later chapters, which tackle advanced topics such as high-performance storage options, rewriting requests, HTTP server acceleration, monitoring, debugging, and troubleshooting Squid.Topics covered include:Compiling and installing Squid Running Squid Using Squid's sophisticated access controls Tuning disk storage for optimal performance Configuring your operating system for HTTP interception Forwarding Requests to other web caches Using redirectors to rewrite user requests Monitoring Squid with the cache manager and SNMP Using Squid to accelerate and protect HTTP servers Managing bandwidth consumption with Delay Pools  

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Lightweight yet powerful, VBScript from Microsoft® is used in four main areas: server-side web applications using Active Server Pages (ASP), client-side web scripts using Internet Explorer, code behind Outlook forms, and automating repetitive tasks using Windows Script Host (WSH). VBScript in a Nutshell, Second Edition delivers current and complete documentation for programmers and system administrators who want to develop effective scripts.Completely updated for VBScript 5.6, WSH 5.6 and ASP 3.0, VBScript In a Nutshell, Second Edition includes updated introductory chapters that will help you keep current with the significant changes since the first edition was published. New chapters introduce the Windows Script Component for creating binary COM components, and the Script Encoder.The main part of the book is a comprehensive reference focusing on VBScript essentials with an alphabetical reference to all statements, keywords and objects, and a section of notes and solutions to real-world gotchas--various undocumented behaviors and aspects of the language--to help you avoid potential problems. Each entry in the reference section details the following: The keyword s syntax, using standard code conventionsA list of arguments accepted by the function or procedure, if any existA discussion of how and where the keyword should be used within the scripting environmentA discussion of the differences between the operation of the keyword in Visual Basic or VBA and in VBScriptRegardless of your level of experience programming with VBScript, VBScript in a Nutshell, Second Edition is the book you ll want by your side--the most complete, up-to-date, and easy-to-use language referenceavailable.  

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Java Web Services in a Nutshell is a high-speed tutorial and a quick reference for the technologies that Sun Microsystems is creating for implementing web services with Java. This book is a succinct introduction and handy reference to the Java/XML APIs, more commonly known as the JWSDP or "Java Web Services Development Pack." These APIs are taking the Java world by storm, as they are capable of handling everything from simple XML to SOAP to full ebXML vocabularies.Although "web services" technology has suffered from much hype and overly grand expectations, there is plenty of solid development going on, especially in extending enterprise applications, and a huge amount of this development is being done in Java. As a result, the J2EE APIs for web services are evolving rapidly, and this new "in a Nutshell" book covers them all in depth.One of the most important APIs in the JWSDP is JAX-RPC (Java API for XML-based RPC). It's also the API that developers most consistently post questions about. Java Web Services in a Nutshell covers all aspects of JAX-RPC in detail, with tutorial coverage alone exceeding 150 pages. This book offers developers everything they need to program with JAX-RPC.Java Web Services in a Nutshell begins with an introduction to Java web services, including a discussion of how they differ from web applications. The author looks at the protocols and interfaces that underpin web services, the J2EE technologies that address web services, WSDL as the means for describe web services, and more. Subsequent chapters cover:JAX-RPC SOAP and the SOAP with Attachments API for Java (SAAJ) Reliable SOAP messaging with JAXM WSDL Advanced JAX-RPC JAXR, the XML-based registry API Web Services Tools The balance of the book is made up of an API Quick Reference containing documentation for the various API packages.Intended for Java developers who need to implement Java services or who need their applications to access existing web services, Java Web Services in a Nutshell delivers practical information to help developers make sense of the rapidly changing and poorly organized official documentation. If web services and Enterprise Java are any part of your job description -- of if you'd like them to be -- you'll want this book close beside as you work.  

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To the outside world, a supercomputer appears to be a single system. In fact, it s a cluster of computers that share a local area network and have the ability to work together on a single problem as a team. Many businesses used to consider supercomputing beyond the reach of their budgets, but new Linux applications have made high-performance clusters more affordable than ever. These days, the promise of low-cost supercomputing is one of the main reasons many businesses choose Linux over other operating systems. This new guide covers everything a newcomer to clustering will need to plan, build, and deploy a high-performance Linux cluster. The book focuses on clustering for high-performance computation, although much of its information also applies to clustering for high-availability (failover and disaster recovery). The book discusses the key tools you ll need to get started, including good practices to use while exploring the tools and growing a system. You ll learn about planning, hardware choices, bulk installation of Linux on multiple systems, and other basic considerations. Then, you ll learn about software options that can save you hours--or even weeks--of deployment time. Since a wide variety of options exist in each area of clustering software, the author discusses the pros and cons of the major free software projects and chooses those that are most likely to be helpful to new cluster administrators and programmers. A few of the projects introduced in the book include: MPI, the most popular programming library for clusters. This book offers simple but realistic introductory examples along with some pointers for advanced use. OSCAR and Rocks, two comprehensiveinstallation and administrative systems openMosix (a convenient tool for distributing jobs), Linux kernel extensions that migrate processes transparently for load balancing PVFS, one of the parallel filesystems that make clustering I/O easier C3, a set of commands for administering multiple systems Ganglia, OpenPBS, and cloning tools (Kickstart, SIS and G4U) are also covered. The book looks at cluster installation packages (OSCAR & Rocks) and then considers the core packages individually for greater depth or for folks wishing to do a custom installation. Guidelines for debugging, profiling, performance tuning, and managing jobs from multiple users round out this immensely useful book.  

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QuickTime Java (QJT) is a terrific multimedia toolkit, but it's also terrifying to the uninitiated. Java developers who need to add audio, video, or interactive media creation and playback to their applications find that QTJ is powerful, but not easy to get into. In fact, when it comes to class-count, QuickTime Java is nearly as large as all of Java 1.1.Once you learn the entire scope of Apple's QuickTime software, you really appreciate the problem. At its simplest, QuickTime allows Mac and Windows users to play audio and video on their computers. But QuickTime is many things: a file format, an environment for media authoring, and a suite of applications that includes browser plug-ins for viewing media within a web page, a PictureViewer for working with still pictures, QuickTime Streaming Server for delivering streaming media files on the Internet in real time, and QuickTime Broadcaster for delivering live events on the Internet. Among others.As if that weren't daunting enough, the javadocs on QJT are wildly incomplete, and other books on the topic are long out of date and not well regarded, making progress with QTJ extremely difficult. So what can you do? Our new hands-on guide, QuickTime Java: A Developer's Notebook, not only catches up with this technology, but de-mystifies it.This practical "all lab, no lecture" book is an informal, code-intensive workbook that offers the first real look at this important software. Like other titles in our Developer's Notebook series, QuickTime Java: A Developer's Notebook is for impatient early adopters who want get up to speed on what they can use right now. It's deliberately light on theory, emphasizing example over explanation and practice over concept, so you can focus on learning by doing.QuickTime Java: A Developer's Notebook gives you just the functionality you need from QTJ. Even if you come to realize that 95% of the API is irrelevant to you, this book will help you master the 5% that really counts.  

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In a corporate setting, the Microsoft Office Suite is an invaluable set of applications. One of Offices biggest advantages is that its applications can work together to share information, produce reports, and so on. The problem is, there isn t much documentation on their cross-usage. Until now. Introducing Integrating Excel and Access, the unique reference that shows you how to combine the strengths of Microsoft Excel with those of Microsoft Access. In particular, the book explains how the powerful analysis tools of Excel can work in concert with the structured storage and more powerful querying of Access. The results that these two applications can produce together are virtually impossible to achieve with one program separately. But the book isn t just limited to Excel and Access. There s also a chapter on SQL Server, as well as one dedicated to integrating with other Microsoft Office applications. In no time, you ll discover how to: Utilize the built in features of Access and Excel to access data Use VBA within Access or Excel to access data Build connection strings using ADO and DAO Automate Excel reports including formatting, functions, and page setup Write complex functions and queries with VBA Write simple and advanced queries with the Access GUI Produce pivot tables and charts with your data With Integrating Excel and Access, you can crunch and visualize data like never before. It s the ideal guide for anyone who uses Microsoft Office to handle data.  

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QuickTime Java (QJT) is a terrific multimedia toolkit, but it's also terrifying to the uninitiated. Java developers who need to add audio, video, or interactive media creation and playback to their applications find that QTJ is powerful, but not easy to get into. In fact, when it comes to class-count, QuickTime Java is nearly as large as all of Java 1.1.Once you learn the entire scope of Apple's QuickTime software, you really appreciate the problem. At its simplest, QuickTime allows Mac and Windows users to play audio and video on their computers. But QuickTime is many things: a file format, an environment for media authoring, and a suite of applications that includes browser plug-ins for viewing media within a web page, a PictureViewer for working with still pictures, QuickTime Streaming Server for delivering streaming media files on the Internet in real time, and QuickTime Broadcaster for delivering live events on the Internet. Among others.As if that weren't daunting enough, the javadocs on QJT are wildly incomplete, and other books on the topic are long out of date and not well regarded, making progress with QTJ extremely difficult. So what can you do? Our new hands-on guide, QuickTime Java: A Developer's Notebook, not only catches up with this technology, but de-mystifies it.This practical "all lab, no lecture" book is an informal, code-intensive workbook that offers the first real look at this important software. Like other titles in our Developer's Notebook series, QuickTime Java: A Developer's Notebook is for impatient early adopters who want get up to speed on what they can use right now. It's deliberately light on theory, emphasizing example over explanation and practice over concept, so you can focus on learning by doing.QuickTime Java: A Developer's Notebook gives you just the functionality you need from QTJ. Even if you come to realize that 95% of the API is irrelevant to you, this book will help you master the 5% that really counts.  

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