Techotopia is a library of free on-line IT books covering a wide range of topics including operating systems, programming, scripting, system administration, networking and much more. The IT Essentials series of books are designed to provide detailed information that is accessible to both experienced and novice readers. Each book contains everything that is needed to gain proficiency in the particular technology subject area.

Visual Basic Essentials is intended to provide everything the aspiring Visual Basic programmer needs to get up to speed with this language. Chapters include the installation of Visual Studio, Variable and Constant types, looping and flow control, Visual Basic string manipulation, form designing, database access, working with arrays, graphics drawing and much, much more.

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The purpose of this book is to provide the essentials of JavaScript so that anyone with a web site can use this powerful scripting language quickly and effectively without having to learn things that, whilst within the capabilities of JavaScript, aren't actually needed by the average web designer. That said, this book does not take any shortcuts. It provides detailed and indepth knowledge of all aspects of JavaScript from language basics through to advanced topics. This book is designed to provide a detailed and comprehensive, yet easy to follow, guide to developing powerful, dynamic web pages using JavaScript. It could be said that the object of JavaScript Essentials is to provide you with everything you need to use JavaScript, and nothing that you don't.

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Despite being a relative newcomer to the Linux landscape, Ubuntu has very quickly gained prominence in what is clearly a very crowded field. Ubuntu routinely tops Linux distribution page ranking on DistroWatch.com, and has been selected by Dell as the Linux to be pre-installed in select systems. Perhaps the most significant achievement for Ubuntu, however, is that it is popular not just to Linux novices, but also with Linux experts, a group of people known for being highly discerning and critical. The purpose of this book is to provide an overview of the essential knowledge required to use and maintain an Ubuntu Linux system. From the basics of installation, configuring the desktop and implementing wireless networking through to tasks such as configuring firewalls, setting up a web server and providing remote desktop access via an SSH tunnel, Ubuntu Linux Essentials takes a step by step approach to installing, using and administering Ubuntu Linux.

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The book is intended to cover all aspects of PHP. It begins by covering the history of PHP before providing a high level overview of how PHP works and why it is so useful to web developers. It then moves on to cover each area of PHP in detail, from the basics of the scripting language through to object oriented programming, file and filesystem handling and MySQL and SQLite database access. In addition, chapters are also provided covering the creation and handling of HTML based forms and maintaining state using cookies and PHP sessions. All topics are accompanied by extensive real world examples intended to bring theory to life.

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Fedora Linux Essentials is designed to provide detailed information on the use and administration of Fedora Linux. For beginners, the book covers the basics of configuring the desktop environment, resolving screen resolution issues and configuring the email client to send and receive email messages via web based services such as GMail. Installation topics such as dual booting with Microsoft Windows and configuring wireless networking are covered together with all important security topics such as configuring a firewall. For the experienced user, topics such as configuring email and web servers, Xen virtualization, Secure Shell (SSH), remote desktop access and file sharing are covered in detail to provide a thorough overview of this popular, cutting edge operating system.

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