Like most complex tasks, .NET programming is fraught with potential costly, and time-consuming hazards. The millions of Microsoft developers worldwide who create applications for the .NET platform can attest to that. Thankfully there's now a book that shows you how to avoid such costly and time-consuming mistakes. It's called .NET Gotchas. The ultimate guide for efficient, pain-free coding, .NET Gotchas from O'Reilly contains 75 common .NET programming pitfalls--and advice on how to work around them. It will help you steer away from those mistakes that cause application performance problems, or so taint code that it just doesn't work right. The book is organized into nine chapters, each focusing on those features and constructs of the .NET platform that consistently baffle developers. Within each chapter are several "gotchas," with detailed examples, discussions, and guidelines for avoiding them. No doubt about it, when applied, these concise presentations of best practices will help you lead a more productive, stress-free existence. What's more, because code examples are written in both VB.NET and C#, .NET Gotchas is of interest to more than 75 percent of the growing numbers of .NET programmers. So if you're a .NET developer who's mired in the trenches and yearning for a better way, this book is most definitely for you.

Если вы решили попробовать свои силы в загадочной системе Linux - то эта книга для вас. Автор - эксперт по Linux - постарался сделать так, чтобы вы освоили Linux, не останавливаясь на мелочах. Изложение ведется на основе небольших, тщательно подобранных примеров, сопровождающих все обсуждаемые темы - все очень быстро, наглядно и эффективно. Вы хотите быстро найти ответы на свои вопросы или шаблонные решения своих задач? Воспользуйтесь уникальным форматом книги, чтобы мгновенно получить ответ! Выбор дистрибутива Linux (Fedora, Mandrake, SuSE), инсталляция системы, работа с командной строкой и рабочими столами KDE, GNOME, подготовка текстов и электронных таблиц в OpenOffice, работа в Web и со средствами мультимедиа - вот далеко не полный список тем, которые вы сможете быстро и легко освоить, прочитав эту книгу.

This painless test preparation tool begins with an introduction to basic electronics and numbering systems relevant to computer processing, then builds hardware knowledge from the bottom up, and finishes off by demonstrating how to work on computers.

Из чего состоит дистрибутив Linux? Как он работает и почему? Что умеет, и как этими умениями управлять? Кто они такие, эти таинственные «линуксо- иды»? пингвины? Если писать программы, то про что их писать? И вообще— что на самом деле такое: «Linux», «Дистрибутив», «Сообщество», «Свободные программы» наконец? Обо всём этом и о некотором другом и написано во второй половине нашей книги. Раз уж приходится управлять таким сложным созданием, как пингвин, и тем более—таким сложным инструментом, как компьютер, без знаний не обойтись. Если вы не считаете поведение компьютера «предопределением природы», и хотите что-то изменить к лучшему, непременно стоит познакомиться с тем, что именно вы хотите изменить. По крайней мере, мы—разработчики дистрибутивов ALT Linux и участники Linux-сообщества—для себя решили начинать именно со знаний.

Практическое пособие новичка. Данное издание предназначено для тех, кто хочет быстро научиться пользоваться смартфоном на операционной системе Android. Весь материал сопровождается подробными скриншотами. Рассматриваются технические моменты от графического интерфейса до установки программ.

Whether you need a network of ten Linux PCs and a server or a datacenter with a few thousand Unix nodes, you need to know how to automate much of the installation, configuration, and standard system administration. Build your network once using cfengine, and the network build will work, without user intervention, on any hardware you prefer.Automating Linux and Unix System Administration, Second Editionis unique in its focus on how to make the system administrator's job easier and more efficient: instead of just managing the system administrator's time, the book explains the technology to automate repetitive tasks and the methodology to automate successfully. Both new and seasoned professionals will profit from industry–leading insights into the automation process. System administrators will attain a thorough grasp of cfengine, kickstart, and shell scripting for automation. After reading all chapters and following all exercises in this book, the reader will be able to set up anything from a Linux datacenter to a small office network. What you'll learn See how to make changes on many UNIX and Linux hosts at once in a reliable and repeatable manner. Learn how to automate things correctly so you only have to do it once, by leveraging the authors' experience in setting up small, medium, and large networks. Set up a Linux datacenter or a network correctly. Explore handling real–world environments where not all hosts are configured alike via a case study of a fictional new datacenter buildout. Examine real–world examples for core infrastructure services (DNS, mail, monitoring, log analysis, security, cfengine, imaging) to build on in your environment. Understand core system administration best practices, which are a key part of how cfengine and automations deployments are outlined in the book. Learn how to make changes reversible, repeatable, and correct the first time through interaction with product/application stakeholders (programmers, product managers, customers, etc.). Who this book is for This book is for Linux system administrators who want to learn about the software and methodology to automate repetitive tasks-regardless of network or datacenter size-in one place. System managers will also find it much easier to think about network technology and automation projects if they read this book. This book is also for anyone who is interested in repeatable and secure infrastructure.

This book focuses on automating the tedious daily tasks of system administration. It provides real-world examples and explores the tools useful for managing 2 or 5,000 systems.

BEA WebLogic Server Unleashed is the definitive reference work for the WebLogic developer, offering an in-depth look at the capabilities provided by WebLogic Server and illustrating the best development practices. The book covers WebLogic's role in every aspect of a J2EE application: from working with Servlets, JavaServer Pages and Enterprise JavaBeans, to managing distributed systems including transactions with JTA, directory services with JNDI, messaging with JMS, and more. The authors pay special attention to testing, optimizing and debugging within WebLogic, to implementing security features, and to administering WebLogic applications.

Designed for Linux newcomers, this book will teach you how to get your system up and running, including verifying proper installation, connecting to the Internet, and reproducing common Windows tasks, such as multimedia playback and office functions.

Эта книга следующая за книгой Linux From Scratch. Она знакомит читателя с дополнениями к системе, включая сеть, графический интерфейс, поддержку звука, принтера и сканера

I run FreeBSD on my computers. A lot of my friends run Linux, or at least one of the distributions of it. Naturally, then, we agree that a Unix-style operating system is the right choice, but we disagree on which to use. It's been my impression that the BSD communit{y,ies}, in general, understand Linux far better than the Linux communit{y,ies} understand BSD. I have a few theories on why that is, but that's not really relevant. I think a lot of Linux people get turned off BSD because they don't really understand how and why it's put together. Thus, this rant; as a BSD person, I want to try to explain how BSD works in a way that Linux people can absorb. While there's overwhelming similarity between the operating systems in most cases, there are also a lot of differences. As you probe more into the differences, you find that they emerge from deep-seated disagreements. Some are disagreements over development methodology, some over deployment and usage, some about what's important, some about who's important, and some about which flavor of ice cream is superior. Just comparing the surface differences doesn't tell you anything; it's the deeper differences that both explain and justify why each group does things the way they do.

Building Embedded Linux Systems shows you how to design and build your own embedded systems using Linux® as the kernel and freely available open source tools as the framework. Written by an active member of the open source community, the book is structured to gradually introduce readers to the intricacies of embedded Linux, with detailed information and examples in each chapter that culminate in describing how Linux is actually put on an embedded device.

This is the definitive resource for every network administrator, consultant, and architect who needs to maximize availability, scalability, and performance in Windows server environments. Drawing on two decades of Windows server experience, Jeffrey Shapiro and Marcin Policht have written the most realistic, comprehensive, and independent Windows high availability guide ever published. One step at, a time, they help you plan, implement, and manage clustering, load balancing, fault tolerance, SQL Server, Exchange Server, and much more. Along the way, they address crucial high availability topics that are virtually ignored by most books, such as disaster recovery, performance monitoring, and operations management. Shapiro and Policht offer a clear, concise roadmap for keeping Windows servers running 24x7 and delivering on even the most challenging service-level agreements. They provide real-world case studies and easy-to-use instructions designed to help readers make better decisions more rapidly.

More than a million systems are now connected to the Internet, and something like 15 million people in 100 countries on all seven continents use Internet services. More than 100 million email messages are exchanged each day, along with countless files, documents, and audio and video images. Everyone is jumping on the Internet bandwagon. Once a haven for academicians and scientists, the Net is now reaching large and small businesses, government at all levels, school children, and senior citizens. The commercial world is rushing headlong into doing business on the Internet, barely pausing while technologies and policies catch up with their desire to go online. But, too few of the seekers after Internet wisdom and riches consider whether their businesses will be safe on the Net. What kinds of security risks are posed by the Internet? Some risks have been around since the early days of networking -- password attacks (guessing them or cracking them via password dictionaries and cracking programs), denial of service, and exploiting known security holes. Some risks are newer and even more dangerous -- packet sniffers, IP (Internet Protocol) forgery, and various types of hijacking attacks. Firewalls are a very effective way to protect your system from these Internet security threats. Firewalls in computer networks keep damage on one part of the network (e.g., eavesdropping, a worm program, file damage) from spreading to the rest of the network. Without firewalls, network security problems can rage out of control, dragging more and more systems down. What is a firewall? It's a hardware and/or software solution that restricts access from your internal network to the Internet -- and vice versa. A firewall may also be used to separate two or more parts of your local network (for example, protecting finance from R&D). The firewall is installed at the perimeter of the network, ordinarily where it connects to the Internet. You can think of a firewall as a checkpoint; all traffic, incoming and outgoing, is stopped at this point. Because it is, the firewall can make sure that it is acceptable. "Acceptable" means that whatever is passing through -- email, file transfers, remote logins, NFS mounts, etc. -- conforms to the security policy of the site. Building Internet Firewalls is a practical guide to building firewalls on the Internet. If your site is connected to the Internet, or if you're considering getting connected, you need this book. It describes a variety of firewall approaches and architectures and discusses how you can build packet filtering and proxying solutions at your site. It also contains a full discussion of how to configure Internet services (e.g., FTP, SMTP, Telnet) to work with a firewall. The book also includes a complete list of resources, including the location of many publicly available firewall construction tools. The book is divided into four parts: Part I discusses Internet threats, the benefits of firewalls, overall security strategies, and a summary of Internet services and their security risks. Part II describes possible firewall designs and general terms and concepts, how to protect the bastion host in your firewall configuration, how to build proxying and packet filtering firewalls, and how to configure Internet services to operate with a firewall. Part III describes how to maintain a firewall, develop a security policy, and respond to a security incident. Part IV contains appendic

This book provides a unique balance of "big picture" principles that transcend specific software packages and version numbers, and very clear procedures on securing some of those software packages. An all-inclusive resource for Linux users who wish to harden their systems, the book covers general security as well as key services such as DNS, the Apache Web server, mail, file transfer, and secure shell.

CAN протокол получил всемирное признание как очень универсальная, эффективная, надежная и экономически приемлемая платформа для почти любого типа связи данных в передвижных системах, машинах, техническом оборудовании и индустриальной автоматизации. Основанная на базе протоколов высокого уровня CAN- технология успешно конкурирует на рынке распределенных систем автоматизации. Под терминами "CAN стандарт" или "CAN протокол" понимаются функциональные возможности, которые стандартизированы в ISO 11898. Этот стандарт объединяет физический уровень (Physical Layer) и уровень канала данных (Data Link Layer) в соответствии с 7-ми уровневой OSI моделью. Таким образом, "CAN стандарт" соответствует уровню сетевого интерфейса в 4-х уровневой модели TCP/IP. Однако, практическая реализация даже очень простых распределенных систем на базе CAN показывает, что помимо предоставляемых сервисов уровня канала данных требуются более широкие функциональные возможности : передача блоков данных длинной более чем 8 байтов, подтверждение пересылки данных, распределение идентификаторов, запуск сети и функции супервизора узлов. Так как эти дополнительные функциональные возможности непосредственно используются прикладным процессом, вводится понятие уровня приложений (Application Layer) и протоколов высокого уровня. Обычно их и называют термином "CAN протоколы".

Эта книга облегчит и сделает максимально эффективной подготовку к сертификационному экзамену Cisco Certified Internetwork Expert (350-001). Написанное экспертами по объединенным сетям, учебное руководство включает в себя:- Предварительный оценочный тест, который помогает определить направление вашей подготовки- Целенаправленное освещение технологий, используемых в сетевых комплексах Cisco- Контрольные вопросы с пояснениями- Подробный анализ всех экзаменационных заданий:- Иерархическая структура сети- Общие стандарты транспорта- Настройка и управление IOS- Frame Relay и Х.25- Отказоустойчивость- Основы TCP/IP- Протоколы внутреннего шлюза- Протоколы граничного шлюза- Взаимодействие протоколов маршрутизации IP- Преобразование сетевых адресов- Маршрутизация групповых IP-рассылок- Обзор комплексных услуг Cisco- Мосты- Коммутация канального уровня- ATM и его эмуляция для локальной сети- Обеспечение безопасности сети

CCNP Practical Studies: Remote Access (CCNP Self-Study) prepares readers for the CCNP 642-821 BCRAN exam and for workplace challenges in implementing remote access network applications. Designed as a topic-by-topic guide of how to apply remote access concepts in a real network setting, this book is useful in preparing a CCNP candidate for the general exam questions by providing a better understanding of how remote access really works. It is also essential in preparing candidates for the new simulation-based questions that are on the Cisco certification exams. Finally, it serves anyone wanting a guide to real-world application of these concepts, regardless of certification interest.

Изучение книги Настройка коммутаторов Cisco - это недорогой и эффективный способ подготовки к последней версии экзамена Cisco по коммутации (640-504). Учебное руководство написано двумя экспертами в области сетевых технологий и содержит следующие элементы подготовки: Предварительную оценочную контрольную работу, помогающую направить усилия по подготовке к экзамену в правильное русло Тематическое рассмотрение коммутационных технологий Cisco Письменные и практические лабораторные работы для закрепления материала Трудные вопросы для повторения