Informatyka

Tkinter GUI Application Development Blueprints. Master GUI programming in Tkinter as you design, implement, and deliver 10 real-world applications

Bhaskar Chaudhary

Tkinter is the built-in GUI package that comes with standard Python distributions. It is a cross-platform package, which means you build once and deploy everywhere. It is simple to use and intuitive in nature, making it suitable for programmers and non-programmers alike. This book will help you master the art of GUI programming. It delivers the bigger picture of GUI programming by building real-world, productive, and fun applications such as a text editor, drum machine, game of chess, media player, drawing application, chat application, screen saver, port scanner, and many more. In every project, you will build on the skills acquired in the previous project and gain more expertise. You will learn to write multithreaded programs, network programs, database driven programs and more. You will also get to know the modern best practices involved in writing GUI apps. With its rich source of sample code, you can build upon the knowledge gained with this book and use it in your own projects in the discipline of your choice.

Tkinter GUI Programming by Example. Learn to create modern GUIs using Tkinter by building real-world projects in Python

David Love

Tkinter is a modular, cross-platform application development toolkit for Python. When developing GUI-rich applications, the most important choices are which programming language(s) and which GUI framework to use. Python and Tkinter prove to be a great combination. This book will get you familiar with Tkinter by having you create fun and interactive projects. These projects have varying degrees of complexity. We'll start with a simple project, where you'll learn the fundamentals of GUI programming and the basics of working with a Tkinter application. After getting the basics right, we'll move on to creating a project of slightly increased complexity, such as a highly customizable Python editor. In the next project, we'll crank up the complexity level to create an instant messaging app. Toward the end, we'll discuss various ways of packaging our applications so that they can be shared and installed on other machines without the user having to learn how to install and run Python programs.

TLS Cryptography In-Depth. Explore the intricacies of modern cryptography and the inner workings of TLS

Dr. Paul Duplys, Dr. Roland Schmitz

TLS is the most widely used cryptographic protocol today, enabling e-commerce, online banking, and secure online communication. Written by Dr. Paul Duplys, Security, Privacy & Safety Research Lead at Bosch, and Dr. Roland Schmitz, Internet Security Professor at Stuttgart Media University, this book will help you gain a deep understanding of how and why TLS works, how past attacks on TLS were possible, and how vulnerabilities that enabled them were addressed in the latest TLS version 1.3. By exploring the inner workings of TLS, you’ll be able to configure it and use it more securely.Starting with the basic concepts, you’ll be led step by step through the world of modern cryptography, guided by the TLS protocol. As you advance, you’ll be learning about the necessary mathematical concepts from scratch. Topics such as public-key cryptography based on elliptic curves will be explained with a view on real-world applications in TLS. With easy-to-understand concepts, you’ll find out how secret keys are generated and exchanged in TLS, and how they are used to creating a secure channel between a client and a server.By the end of this book, you’ll have the knowledge to configure TLS servers securely. Moreover, you’ll have gained a deep knowledge of the cryptographic primitives that make up TLS.

Tokenomics. The Crypto Shift of Blockchains, ICOs, and Tokens

Sean Au, Thomas Power(GBP)

Tokenomics is the economy of this new world. This is a no-holds-barred, in-depth exploration of the way in which we can participate in the blockchain economy. The reader will learn the basics of bitcoin, blockchains, and tokenomics; what the very first ICO was; and how over a period of 5 years, various projects managed to raise the enormous sums of money they did. The book then provides insights from ICO experts and looks at what the future holds. By comparing the past, current, and future of this technology, the book will inform anyone, whatever motivates their interest.The crypto shift of blockchains, ICOs, and tokens is much more than just buying bitcoins, creating tokens, or raising millions in a minute in an ICO. It is a new paradigm shift from centralized to decentralized, from closed to open, and from opaqueness to transparency. ICOs and the creation of tokens during the craze of 2017 needed a lot of preparation, an understanding of cryptocurrencies and of emerging legal frameworks, but this has spurred a new movement to tokenize the world.The author gives an unbiased, authoritative picture of the current playing field, exploring the token opportunities and provides a unique insight into the developing world of this tokenized economy. This book will nourish hungry minds wanting to grow their knowledge in this fascinating area.

Tomcat 6 Developer's Guide. Understanding how a servlet container actually works will add greatly to your Java EE web programming skills, and this comprehensive guide to Tomcat is the perfect starting point

Damodar Chetty

While Tomcat is one of the most popular servlet containers, its inner workings still remain a mystery to many developers. If you only have a superficial familiarity of how this container actually functions, much of its power remains untapped and underutilized. This book will provide you with all that you need to undertand how to effectively use Apache Tomcat. This book begins by providing detailed instructions on building a Tomcat distribution. The next few chapters introduce you to the conceptual underpinnings of web servers, the Java EE and servlet specifications, and the Tomcat container. Subsequent chapters address the key Tomcat components, taking care to provide you with the information needed to understand the internal workings of each component. Detailed examples let you walk through a Tomcat installation, stepping into key Tomcat components, as well as into your own custom servlets.During the course of the book you will encounter various structural components such as the Server and Service; containers such as the Engine, Host, Context, and Wrapper; and helpers such as the Loader, Manager, and Valve. You will also see how Tomcat implements the JNDI API to provide both a directory service for storage agnostic access to its resources, as well as a naming service that implements the Java EE Environment Naming Context.Along the way you will learn how various elements of the servlet 2.5 specification, as well as the HTTP RFCs are implemented by a servlet container. By the end of your journey, you will be able to count yourself as part of the elite minority of Java EE web developers who truly understand what goes on under the covers of a servlet container.

Tomcat. Przewodnik encyklopedyczny. Wydanie II

Jason Brittain, Ian Darwin

Poznaj możliwości serwera Tomcat! Jak dostroić Tomcat w celu pomiaru i poprawy wydajności? Jak wdrażać aplikacje WWW z serwletami i stronami JSP? Jak diagnozować problemy z serwerem? Tomcat jest kontenerem serwletów Java i serwerem WWW stworzonym przez organizację Apache Software Foundation. Może pełnić rolę serwera produkcyjnego o dużej wydajności, sprawdza się również jako darmowy kontener serwletów i stron JSP z udostępnionym kodem źródłowym. Tomcat może być zastosowany niezależnie lub w połączeniu z innymi serwerami WWW (np. httpd Apache). Doskonale radzi sobie w każdego rodzaju środowisku, zapewniając fundament wymagany do praktycznego wykorzystania w Internecie umiejętności z zakresu technologii Java. W książce "Tomcat. Przewodnik encyklopedyczny" znajdziesz szczegółowe wyjaśnienia, jak korzystać z tego serwera. Czytając ją, poznasz wszelkie procedury instalacyjne oraz możliwości konfigurowania obszarów, ról, użytkowników i zasobów JNDI. Nauczysz się, jak uaktywniać i wyłączać funkcję automatycznego przeładowywania serwletów, a także wdrażać aplikacje WWW. Niezbędne informacje dotyczące serwera Tomcat znajdą tu nie tylko programiści, ale także administratorzy, webmasterzy i wszyscy, którzy chcą się dowiedzieć czegoś o tym kontenerze serwletów. Instalowanie i konfigurowanie Tomcata Zarządzanie obszarami, rolami i użytkownikami Uruchamianie i zatrzymywanie serwera Kontrolowanie i utrwalanie sesji Optymalizowanie wydajności serwera Integracja z serwerem WWW Apache Wdrażanie rozpakowanego katalogu aplikacji WWW Praca z plikami WAR Zabezpieczenia serwera Tomcat Przewodnik dla wszystkich, którzy chcą ułatwić sobie pracę z serwerem Tomcat.

Tools and Skills for .NET 10. Get the career you want with good practices and patterns to design, debug, and test your solutions - Second Edition

Mark J. Price

.NET is more powerful—and more complex—than ever. As the ecosystem evolves, so do the expectations from developers. Mastering the tools and patterns of professional .NET development can be the difference between simply shipping code and delivering resilient, scalable software. Tools and Skills for .NET 10 is a practical guide to leveling up in today’s .NET world, offering both hard technical skills and career strategies to help you thrive.Inside, you’ll learn how to manage codebases with Git and implement debugging and memory analysis techniques that save hours of guesswork. The book also covers best practices for writing and maintaining documentation for your code, services, and APIs, which is crucial for team collaboration. You’ll explore cryptography for securing data and concurrency for building responsive apps. Further chapters explore dependency injection, testing for performance and reliability, and packaging your apps in Docker containers.By the end of this book, you’ll be equipped not only with technical skills but also with the confidence to apply them in real environments. Whether you're aiming for a promotion, switching jobs, or preparing for technical interviews, you'll have the skills and the language to present yourself as a capable, well-rounded .NET developer ready for anything the industry throws at you.

TPRM-Driven Supply Chain Cybersecurity. Connecting TPRM and supply chain security for operational resilience

Eric Richardson, Filipi Pires

Modern organizations rely on complex vendor ecosystems, but third-party risk management (TPRM) and cybersecurity often operate in silos. This book shows how to connect vendor risk management with supply chain cybersecurity using a practical, lifecycle-driven approach.You’ll design a program covering onboarding, vendor risk assessment, continuous monitoring, and offboarding. You’ll begin by examining why TPRM and cybersecurity often operate in separate lanes, and what that gap costs in downtime, breach impact, and compliance exposure. Next, you’ll develop a modern taxonomy of supply chain risk, including fourth-party dependencies and software supply chain concerns, so risk discussions use consistent categories and measurable assumptions.From there, you’ll adopt a lifecycle-based model to structure vendor onboarding, assessment, monitoring, and offboarding—supported by vendor tiering, segmentation, and control mapping. The final chapter focuses on the regulatory blueprint: how to interpret NIST C-SCRM, ISO/IEC 27036, DORA, GDPR, and Executive Order 14028, then convert them into evidence-driven controls and audit-ready documentation.

TPRM-Driven Supply Chain Cybersecurity. Connecting TPRM and supply chain security for operational resilience

Eric Richardson, Filipi Pires

Modern organizations rely on complex vendor ecosystems, but third-party risk management (TPRM) and cybersecurity often operate in silos. This book shows how to connect vendor risk management with supply chain cybersecurity using a practical, lifecycle-driven approach.You’ll design a program covering onboarding, vendor risk assessment, continuous monitoring, and offboarding. You’ll begin by examining why TPRM and cybersecurity often operate in separate lanes, and what that gap costs in downtime, breach impact, and compliance exposure. Next, you’ll develop a modern taxonomy of supply chain risk, including fourth-party dependencies and software supply chain concerns, so risk discussions use consistent categories and measurable assumptions.From there, you’ll adopt a lifecycle-based model to structure vendor onboarding, assessment, monitoring, and offboarding—supported by vendor tiering, segmentation, and control mapping. The final chapter focuses on the regulatory blueprint: how to interpret NIST C-SCRM, ISO/IEC 27036, DORA, GDPR, and Executive Order 14028, then convert them into evidence-driven controls and audit-ready documentation.

TradeStation EasyLanguage for Algorithmic Trading. Discover real-world institutional applications of Equities, Futures, and Forex markets

Domenico D'Errico

With AI revolutionizing financial markets, every trader will soon get easy access to AI models through free Python libraries and datasets, with all of them making the same trades! This behavior will modify prices and trading volumes, potentially altering future datasets, leading to major corporations investing heavily in technology, big data, and expert teams.However, individual traders need not be intimidated because this dynamic has been seen before whenever new technologies have entered the trading market. Written by a quantitative algorithmic trading developer with over 15 years of experience in the finance industry, this book will ground you by taking a rational approach to algorithmic trading, where EasyLanguage, datasets, charts, and AI are tools for your journey toward mastering the markets. Your unique human intelligence remains invaluable in navigating and understanding market complexities as you explore the realm of institutional insights, satisfying your hunger to learn real-world algorithmic trading applications from the institutional perspective.By the end of this book, you’ll be able to confidently apply TradeStation EasyLanguage to algorithmic trading, integrate machine learning to refine your strategies, and craft a personalized approach to confidently navigate the financial markets.

Train Your Own GPT. How to Train ChatGPT to Think Like You

MrExcel's Holy Macro! Books, Bill Jelen

This book offers a hands-on guide to building GPTs that learn, adapt, and respond in your unique style. It begins by breaking down how ChatGPT understands instructions, then guides readers through training personalized GPTs that automate tasks, create structured outputs, and integrate across business applications.Readers gain practical experience in linking GPTs with Excel, Power Automate, and APIs while exploring advanced memory, context, and action features. With clear guidance, examples, and exercises, the book bridges theory and application to make AI personalization achievable for any professional.By the end, readers can confidently design custom AI agents that extend beyond ChatGPT’s limits—capable of mirroring workflows, preferences, and communication style for real-world automation and creativity.

Transformer, BERT, and GPT. Unlock the Power of Transformers, BERT, GPT-3, and GPT-4 in Natural Language Processing

Mercury Learning and Information, Oswald Campesato

This book offers an in-depth exploration of the Transformer architecture, BERT models, and the GPT series, including GPT-3 and GPT-4. Beginning with foundational concepts like the attention mechanism and tokenization techniques, it delves into the intricacies of Transformer and BERT architectures. Advanced topics cover the latest developments in the GPT series, including ChatGPT. Key chapters provide insights into the evolution and significance of attention in deep learning, the nuances of Transformer architecture, a detailed exploration of the BERT family, and hands-on guidance on working with GPT-3.The journey continues with a comprehensive overview of ChatGPT, GPT-4, and visualization using generative AI. The book also discusses influential AI organizations such as DeepMind, OpenAI, Cohere, and Hugging Face. Readers will gain a thorough understanding of the current landscape of NLP models, their underlying architectures, and practical applications.Companion files with numerous code samples and figures from the book enhance the learning experience, providing practical tools and resources. This book is an essential guide for those seeking to master the latest advancements in natural language processing and generative AI.

Transformer, BERT, and GPT. Unlock the Power of Transformers, BERT, GPT-3, and GPT-4 in Natural Language Processing

Mercury Learning and Information, Oswald Campesato

This book offers an in-depth exploration of the Transformer architecture, BERT models, and the GPT series, including GPT-3 and GPT-4. Beginning with foundational concepts like the attention mechanism and tokenization techniques, it delves into the intricacies of Transformer and BERT architectures. Advanced topics cover the latest developments in the GPT series, including ChatGPT. Key chapters provide insights into the evolution and significance of attention in deep learning, the nuances of Transformer architecture, a detailed exploration of the BERT family, and hands-on guidance on working with GPT-3.The journey continues with a comprehensive overview of ChatGPT, GPT-4, and visualization using generative AI. The book also discusses influential AI organizations such as DeepMind, OpenAI, Cohere, and Hugging Face. Readers will gain a thorough understanding of the current landscape of NLP models, their underlying architectures, and practical applications.Companion files with numerous code samples and figures from the book enhance the learning experience, providing practical tools and resources. This book is an essential guide for those seeking to master the latest advancements in natural language processing and generative AI.

Transformers for Natural Language Processing. Build innovative deep neural network architectures for NLP with Python, PyTorch, TensorFlow, BERT, RoBERTa, and more

Denis Rothman

The transformer architecture has proved to be revolutionary in outperforming the classical RNN and CNN models in use today. With an apply-as-you-learn approach, Transformers for Natural Language Processing investigates in vast detail the deep learning for machine translations, speech-to-text, text-to-speech, language modeling, question answering, and many more NLP domains with transformers.The book takes you through NLP with Python and examines various eminent models and datasets within the transformer architecture created by pioneers such as Google, Facebook, Microsoft, OpenAI, and Hugging Face.The book trains you in three stages. The first stage introduces you to transformer architectures, starting with the original transformer, before moving on to RoBERTa, BERT, and DistilBERT models. You will discover training methods for smaller transformers that can outperform GPT-3 in some cases. In the second stage, you will apply transformers for Natural Language Understanding (NLU) and Natural Language Generation (NLG). Finally, the third stage will help you grasp advanced language understanding techniques such as optimizing social network datasets and fake news identification.By the end of this NLP book, you will understand transformers from a cognitive science perspective and be proficient in applying pretrained transformer models by tech giants to various datasets.

Transformery w przetwarzaniu języka naturalnego i widzenia komputerowego. Generatywna AI oraz modele LLM z wykorzystaniem Hugging Face, ChatGPT, GPT-4V i DALL-E 3. Wydanie III

Denis Rothman

Transformery zrewolucjonizowały przetwarzanie języka naturalnego, analizę obrazów i komputerowe widzenie. Oparte na transformerach duże modele generatywne dostępne za pośrednictwem systemu ChatGPT z GPT-4V w zadaniach przetwarzania tekstu i obrazów przewyższają wydajność człowieka. Aby uczestniczyć w tej nowej erze technologicznej, musisz zrozumieć, jak działają transformery. Tę książkę docenią praktycy: analitycy danych i inżynierowie uczenia maszynowego. Opisano w niej różne architektury transformerów - od pierwszych modeli podstawowych po najnowsze osiągnięcia w generatywnej sztucznej inteligencji. Dzięki lekturze nauczysz się wstępnego szkolenia i dostrajania modeli LLM, a także pracy nad różnymi przypadkami użycia. Poznasz takie problemy jak halucynacje i zagrożenia prywatności, a następnie dowiesz się, jak je łagodzić. W książce pokazano ponadto, jak poprawiać dokładność modeli LLM i uzyskiwać większą kontrolę nad generowanymi przez nie wynikami. Nie zabrakło ciekawych szczegółów dotyczących modeli generatywnych opartych na transformerach, modeli wizyjnych i architektur multimodalnych, jak również opisu najlepszych praktyk. Najciekawsze tematy: wstępne szkolenie i dostrajanie modeli LLM platformy: Hugging Face, OpenAI i Google Vertex AI tokenizery i najlepsze praktyki wstępnego przetwarzania danych językowych techniki łagodzenia halucynacji wizualizacja aktywności modeli transformerów z użyciem systemów BertViz, LIME i SHAP modele wizyjne i multimodalne oparte na transformerach: CLIP, DALL-E 2, DALL-E 3 i GPT-4V Sztuczna inteligencja, która widzi i mówi - przekonaj się, jak to działa!

Trening intelektu dla dzieci

Paulina Mechło, Roksana Kosmala

Zostań supermistrzem w krainie łamigłówek! >>Posłuchaj wywiadu Krystiana Hanke (Projekt Tatowanie / Radio 357) z Pauliną Mechło Rozwój intelektu u dziecka nie jest procesem ani ciągłym, ani jednolitym. Każdy rodzic wie, że kolejne umiejętności, zdolność do analizy i syntezy oraz do wyciągania właściwych wniosków w różnych sytuacjach życiowych przychodzą nagle, prawie jak olśnienie. Nie można jednak liczyć na żaden skok w tej dziedzinie, jeśli młody mózg pozbawiony jest pożywki intelektualnej, wielorakiej stymulacji i wyzwań. Dlatego właśnie szczególnie dzieci — choć oczywiście nie tylko one — powinny mieć stały dostęp do zagadek, łamigłówek, ćwiczeń i zadań pobudzających neurony oraz łączących proces myślenia z koordynacją ruchową, a do tego wciągających i ciekawych. Takie zadania można znaleźć w tej książce! Jej autorki wiedzą, jak pobudzić różne obszary mózgu dziecka, zapewnić mu świetną zabawę i odpowiednią dawkę wysiłku umysłowego. Ćwicz z dzieckiem myślenie! Dla młodych zagadkowiczów! Jeśli chcesz poprawić swoją pamięć, żeby szybciej uczyć się do klasówek, zwiększyć umiejętność kojarzenia faktów, łatwiej ogarniać nowe wiadomości i w ogóle lepiej myśleć, te zadania pomogą Ci osiągnąć cel! Nie są trudne, są za to ciekawe i zabawne! Będziesz łączyć sylaby, wymyślać nazwy, rysować jabłka i szukać wzorów w różnych kombinacjach rysunków. Zobacz, jak łatwo zostać mistrzem!

TrixBox Made Easy. A step-by-step guide to installing and running your home and office VoIP system

Barrie Dempster, Kerry Garrison

TrixBox is a telephone system based on the popular open source Asterisk PBX (Private Branch eXchange) Software. TrixBox allows an individual or organization to setup a telephone system with traditional telephone networks as well as Internet based telephony or VoIP (Voice over Internet Protocol). SugarCRM can be integrated with Asterisk, and is bundled with Trixbox offering real power and flexibility.The book begins by introducing telephony concepts before detailing how to plan a telephone system and moving on to the installation, configuration, and management of a feature packed PBX.This book is rich with practical examples and tools. It provides examples of well laid out telephone systems with accompanying spreadsheets to aid the reader in building stable telephony infrastructure.

Troubleshooting CentOS. A practical guide to troubleshooting the CentOS 7 community-based enterprise server

Jonathan Hobson

It is assumed that you will already have a server up and running, you have a good working knowledge of CentOS, and you are comfortable with the concept of working with those services used by your server.

Troubleshooting Citrix XenApp(R). Identify and resolve key Citrix XenApp® issues using trusted troubleshooting and monitoring techniques

Dragos Madarasan

Citrix XenApp® is an application virtualization product from Citrix. It allows users to connect to their corporate applications from various computer systems and even mobile devices. XenApp® has grown into a complex software with ever-expanding infrastructures in place. Together with tight integrations with other systems such as Terminal Services, Active Directory, and other third-party authentication services, troubleshooting XenApp® has become more complicated.This book teaches you how to approach troubleshooting complex issues with XenApp® deployments and understand the problem, find a fix or workaround, determine the root cause, and apply corrective steps wherever applicable. The book progresses to give you an idea about the many supportive components that play an important role in XenApp’s application delivery model and should be considered while troubleshooting XenApp® issues. It also shows you standard troubleshooting processes so that you can resolve complex XenApp® issues in a mission critical environment.By the end of this book, you will see how and where to use supportive components that help minimize XenApp® issues. Also, we’ll explain various tools that can be useful when monitoring and optimizing entire application and desktop delivery model.

Troubleshooting Citrix Xendesktop. The ultimate troubleshooting guide for clear, concise, and real-world solutions to a wide range of common Citrix XenDesktop problems

Gurpinder Singh

In today’s world, many organizations have decided to move to secure and stable VDI platforms to benefit their organization to meet their security needs. To meet an organization’s requirements, Citrix XenDesktop serves as the best desktop virtualization solution available, providing the optimum user experience.Troubleshooting Citrix XenDesktop is a single resource guide that will help you dig deep into all the technical issues you encounter to resolve them using an autonomous and well-defined approach.The book starts by walking you through the XenDesktop architecture and the troubleshooting toolkit for Citrix XenDesktop. The subsequent chapters will help you identify possible causes of various types of Citrix XenDesktop problems that may arise while installing, configuring, or troubleshooting day-to-day problems. You will also be dealing with the most common and important VDA registration problems that you might often face while working with the XenDesktop product suite. Additionally, you will resolve issues that arise while launching Citrix sessions, troubleshoot performance issues, and learn how to integrate Citrix NetScaler with your XenDesktop environment.

Troubleshooting Docker. Develop, test, automate, and deploy production-ready Docker containers

Vaibhav Kohli, Rajdeep Dua, John Wooten

You?re pro Docker? You?ve read all about orchestration with Docker in books? Now learn how to troubleshoot Docker in practice. Gain all the tools to safely see Docker in action with this 2017 book.

Troubleshooting OpenVPN. Get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running

Eric F Crist

OpenVPN, the most widely used open source VPN package, allows you to create a secure network across systems, keeping your private data secure. Connectivity and other issues are a pain to deal with, especially if they are impacting your business. This book will help you resolve the issues faced by OpenVPN users and teach the techniques on how to troubleshoot it like a true expert. This book is a one stop solution for troubleshooting any issue related to OpenVPN. We will start by introducing you to troubleshooting techniques such as Packet Sniffing, Log Parsing, and OpenSSL. You will see how to overcome operating system specific errors. Later on, you will get to know about network and routing errors by exploring the concepts of IPv4 and IPv6 networking issues. You will discover how to overcome these issues to improve the performance of your OpenVPN deployment. By the end of the book, you will know the best practices, tips, and tricks to ensure the smooth running of your OpenVPN.

Troubleshooting OpenVPN. Get the solutions you need to troubleshoot any issue you may face to keep your OpenVPN up and running

Eric F Crist

OpenVPN, the most widely used open source VPN package, allows you to create a secure network across systems, keeping your private data secure. Connectivity and other issues are a pain to deal with, especially if they are impacting your business. This book will help you resolve the issues faced by OpenVPN users and teach the techniques on how to troubleshoot it like a true expert. This book is a one stop solution for troubleshooting any issue related to OpenVPN. We will start by introducing you to troubleshooting techniques such as Packet Sniffing, Log Parsing, and OpenSSL. You will see how to overcome operating system specific errors. Later on, you will get to know about network and routing errors by exploring the concepts of IPv4 and IPv6 networking issues. You will discover how to overcome these issues to improve the performance of your OpenVPN deployment. By the end of the book, you will know the best practices, tips, and tricks to ensure the smooth running of your OpenVPN.

Troubleshooting PostgreSQL. Intercept problems and challenges typically faced by PostgreSQL database administrators with the best troubleshooting techniques

Hans-Jürgen Schönig

If you are a database administrator looking for solutions to common PostgreSQL problems, this is the book for you. The book is suitable for people with intermediate and professional expertise.

Troubleshooting System Center Configuration Manager

Gerry Hampson, Peter Egerton

Microsoft System Center Configuration Manager is the most popular enterprise client management solution in the world with some of the best features available. Troubleshooting this product, however, is not always as simple as you might want, not least getting to know the hundreds of log files and understanding how the various components work.The book starts with discussing the most commonly used tools for troubleshooting the variety of problems that can be seen in Configuration Manager. It then moves to providing a high level view of the available log files, their locations, what they relate to and what they typically contain. Next, we will look at how we can fully utilize and extend all the available information from the console monitoring pane through to the status messages and down into error logging with some further reaches into WMI, SQL, registry and the file structure. You will then learn what the common error codes mean, how to make sense of the less common ones and what they actually mean with respect to Configuration Manager. Further to this, you will pick up widely acknowledged best practices both from a proactive stance when carrying out your daily administrative tasks and also from a reactive position when the green lights start to turn red right down to a complete failure situation. By the end of the book, you will be competent enough to identify and diagnose the root causes of System Center Configuration Manager administration issues and resolving them.

Troubleshooting Ubuntu Server. Make life at the office easier for server administrators by helping them build resilient Ubuntu server systems

Skanda Bhargav

Ubuntu is becoming one of the favorite Linux flavors for many enterprises and is being adopted to a large extent. It supports a wide variety of common network systems and the use of standard Internet services including file serving, e-mail, Web, DNS, and database management. A large scale use and implementation of Ubuntu on servers has given rise to a vast army of Linux administrators who battle it out day in and day out to make sure the systems are in the right frame of operation and pre-empt any untoward incidents that may result in catastrophes for the businesses using it. Despite all these efforts, glitches and bugs occur that affect Ubuntu server's network, memory, application, and hardware and also generate cloud computing related issues using OpenStack.This book will help you end to end. Right from setting up your new Ubuntu Server to learning the best practices to host OpenStack without any hassles. You will be able to control the priority of jobs, restrict or allow access users to certain services, deploy packages, tackle issues related to server effectively, and reduce downtime.Also, you will learn to set up OpenStack, and manage and monitor its services while tuning the machine with best practices. You will also get to know about Virtualization to make services serve users better. Chapter by chapter, you will learn to add new features and functionalities and make your Ubuntu server a full-fledged, production-ready system.

Truffle Quick Start Guide. Learn the fundamentals of Ethereum development

Nikhil Bhaskar

Truffle is a world-class development environment, testing framework and asset pipeline for Ethereum, aiming to make life as an Ethereum developer easier.If you are a web developer wanting to try your hand at developing Dapps with Truffle, then this is the book for you. This book will teach you to write smart contracts and build Dapps with Truffle. You will begin with covering the basics of Truffle, briefly explaining how it integrates Solidity and Web3, in orderto start building a mini decentralized application. Also, you will dive into migration, testing and integrating Truffle with the use of popular JavaScript frameworks. Lastly, you will ship your decentralized application and package it into a product. Moreover, you will go through the best practices in Truffle,so as to increase your proficiency in building Dapps with Truffle.By the end of the book, you will be able to write smart contracts and build decentralized applications with Truffle on Ethereum blockchains.

Truffle Quick Start Guide. Learn the fundamentals of Ethereum development

Nikhil Bhaskar

Truffle is a world-class development environment, testing framework and asset pipeline for Ethereum, aiming to make life as an Ethereum developer easier.If you are a web developer wanting to try your hand at developing Dapps with Truffle, then this is the book for you. This book will teach you to write smart contracts and build Dapps with Truffle. You will begin with covering the basics of Truffle, briefly explaining how it integrates Solidity and Web3, in orderto start building a mini decentralized application. Also, you will dive into migration, testing and integrating Truffle with the use of popular JavaScript frameworks. Lastly, you will ship your decentralized application and package it into a product. Moreover, you will go through the best practices in Truffle,so as to increase your proficiency in building Dapps with Truffle.By the end of the book, you will be able to write smart contracts and build decentralized applications with Truffle on Ethereum blockchains.