Operativsystemer

"Start taking better photos with your iPhone! I remember my first phone. It had a cord attached and was shaped like a popular animated character. You didn't surf the Internet on it. You didn't send text messages. You didn't check your email. And you definitely didn't take pictures on it! Times have changed, haven't they? Most people probably don't even have a camera that's not attached to their phones. iPhons don't match the quality of a DSLR camera-but they're certainly coming close. This book won't teach you how to be the next Ansel Adams, but it will teach things you probably never knew about the camera and photo app. Inside, I'll show you how to: Take and edit photos -- Organize photos -- Use different photo modes and lenes -- Use photographic styles -- And much more. If you are ready to get the most out of your iPhone camera, then read on! Note: this book is based off of the iPhone 14 Pro, which has photo features (notably ProRes) that are not available on other iPhones. I will point out when a feature might not work on your phone." --

With the advent of emerging and complex technologies, traffic capture and analysis play an integral part in the overall IT operation. This book outlines the rich set of advanced features and capabilities of the Wireshark tool, considered by many to be the de-facto Swiss army knife for IT operational activities involving traffic analysis. This open-source tool is available as CLI or GUI. It is designed to capture using different modes, and to leverage the community developed and integrated features, such as filter-based analysis or traffic flow graph view. You'll start by reviewing the basics of Wireshark, and then examine the details of capturing and analyzing secured application traffic such as SecureDNS, HTTPS, and IPSec. You'll then look closely at the control plane and data plane capture, and study the analysis of wireless technology traffic such as 802.11, which is the common access technology currently used, along with Bluetooth. You'll also learn waysto identify network attacks, malware, covert communications, perform security incident post mortems, and ways to prevent the same. The book further explains the capture and analysis of secure multimedia traffic, which constitutes around 70% of all overall internet traffic. Wireshark for Network Forensics provides a unique look at cloud and cloud-native architecture-based traffic capture in Kubernetes, Docker-based, AWS, and GCP environments. What You'll LearnReview Wireshark analysis and network forensicsStudy traffic capture and its analytics from mobile devicesAnalyze various access technology and cloud trafficWrite your own dissector for any new or proprietary packet formatsCapture secured application traffic for analysisWho This Book Is ForIT Professionals, Cloud Architects, Infrastructure Administrators, and Network/Cloud Operators

Journey into the world of Web3-based application development, its related protocols, and its usage in developing decentralized applications. This book will explain how programmable blockchains are revolutionizing the world of web applications, which can be run on decentralized platforms or peer-to-peer networks like IPFS.You'll start with an introduction to decentralization with a focus on blockchain implementations like Ethereum and Bitcoin. You'll then learn to develop simple decentralized applications (dApps) using Solidity, the language used for developing apps with Ethereum as well as smart contracts, wallets, gateways and NFTs. This book also covers how security and scale are addressed by L2 networks for scaling Bitcoin and Ethereum blockchains. A Brief Introduction to Web3 is your go-to guide for setting up simple Web3 applications using the Ethereum blockchain programming model.WhatYou Will Learn Build NFT tokensExamine Web3 differs from Web2-based applicationsUnderstand the fundamentals of blockchain and the corresponding data structures around itSee how consensus and trustless computing can be performed using blockchain Use Solidity and Truffle to build Web3 applications Who This Book Is ForSoftware developers and architects who are looking to hone their skills in dApps and web3 applications developed on sound principles of decentralized computing.

Learn the tricks of simple procedural generation and how various genres, such as racing simulators, platformers, and roguelikes, can all benefit from these techniques.In this book, you'll learn how to combine hand-crafted content with algorithms to create immersive and beautiful environments. You'll learn how to create a seeding system, so that you can replay great levels with your friends. We'll cover how to create good tilesets, how to use the tilemap editor effectively, and how to inject just the right amount of logic into an otherwise automated machine that is your own personal procedural content generation engine.We will use 2D examples to demonstrate the concepts covered throughout the book. By the time you complete this book, yoüll have a good handle on how to add procedural generation to your games.What You Will LearnLearn to set up the perfect content generation system Master the tools for randomization andrepeatabilityUnderstand how much content to craft versus how much to generateWho This Book Is ForBasic familiarity with the Godot engine and GDScript is essential. While all concepts are explained in the book, it can be overwhelming learning these techniques at the same time as learning the engine.

Learn the fundamental concepts and skills by building your own virtual machineVirtualization is more important than ever, it's how the Cloud works! As virtualization continues to expand, millions of companies all over the world are leveraging virtualization. IT professionals need a solid understanding of virtualization concepts and software to compete in today's job market.The updated new edition of Virtualization Essentials teaches you the core concepts and skills necessary to work with virtualization environments. Designed for new and aspiring IT professionals alike, this practical guide offers an applied, real-world approach to help you develop the necessary skill set to work in Cloud computing, the DevOps space, and the rest of the virtual world.Virtualization Essentials simplifies complex concepts to ensure that you fully understand what virtualization is and how it works within the computing environment. Step by step, you'll learn how to build your own virtual machine, both by scratch and by migrating from physical to virtual. Each user-friendly chapter contains an overview of the topic, a discussion of key concepts, hands-on tutorials, end-of-chapter exercises, review questions, and more.* Configure and manage a virtual machine's CPU, memory, storage, and networking* Distinguish between Type 1 and Type 2 hypervisors* Compare the leading hypervisor products in today's market* Configure additional devices for a virtual machine* Make considerations for availability* Understand how cloud computing leverages virtualizationVirtualization Essentials is an invaluable 'learn-by-doing' resource for new and aspiring IT professionals looking to gain a solid foundation in virtualization. It is also an excellent reference for more experienced IT admins responsible for managing on-premise and remote computers and workstations.

"Skip the iPhone, iPod, and the Macintosh. If we want to understand how Apple Computer became an industry behemoth, we have to look elsewhere: at the 1977 Apple II. Designed by the prodigious engineer Steve Wozniak, and hustled into the marketplace by his Apple cofounder Steve Jobs, the Apple II would become one of the most prominent personal computers of this dawning American industry. The Apple II was a versatile piece of hardware, but its most compelling story isn't found in the feat of its engineering, the personalities of Apple's founders, or the way it set a stage for the company's multi-billion-dollar future. Instead, computer and video game historian Laine Nooney suggests that what made the Apple II iconic was its software. In software, we discover the material reasons people bought computers. Not to hack, but to play. Not to code, but to calculate. Not to program, but to print. The story of personal computing in the United States is not the story of the rise of the hacker. It is the story of the rise of the user. Offering a constellation of software creation stories, Nooney puts forth a new understanding of how the hobbyists' microcomputers of the 1970s became the personal computer we know today. From iconic software products like VisiCalc and The Print Shop to historic games like Mystery House and Snooper Troops, to long forgotten disk-cracking utilities, The Apple II Age offers an unprecedented look at the people, the industry, and the money that built the microcomputing milieu-and why so much of it converged around the unbeatable Apple II"--

This book constitutes the revised selected papers of the 10th International Conference on Networked Systems, NETYS 2022, held as virtual event, in May 17-19, 2022. The conference was held virtually due to the COVID-19 crisis.The 18 full papers and 2 short papers presented were carefully reviewed and selected from 100 submissions. The scope of the conference covers all aspects related to the design and the development of these systems, including multi-core architectures, Concurrent and distributed algorithms, parallel/concurrent/distributed programming, distributed databases, big data applications and systems, cloud systems, networks, security, and formal verification.They were organized in topical sections as follows: Distributed System; Networking; Verification; Security.

Learn the skills and solutions required to secure your Mac's operating system, the underlying hardware, and allow users to get work done safely. This book will show you how to create a Mac that¿s made of steel and won¿t buckle when attacked!Ok, there¿s no such thing as unhackable. No magic tool or silver bullet will eliminate risk in all forms. Security is an ongoing journey ¿ not a simple action or software application. And that is exactly what yoüll learn to master¿the foundational knowledge, skills, and mindset to holistically protect Macs. Regardless of whether it¿s your personal iMac or a fleet of MacBook Prös assigned to the remote employees within your organization, yoüll be able to limit access while identifying and mitigating risk unique to your environment.In addition to the information security best practices pertaining to protecting Apple computers, yoüll pivot to a coherent, security-focused mindset to better understand macOS-specificsecurity. Yoüll learn how it works and what tools and software are available to help. Both native and 3rd-party tool are covered. Safe guard your system¿s privacy data and capitalize on effectively locking down the security of your Mac computers against known threats and newer trends that continue to evolve.Hardening Your Macs is the perfect roadmap to stopping malicious attacks and bad actors from spying on users through cameras, microphones, and other built-in tools that could potentially be used against users and organizations alike. What You'll LearnGrasp the mindset of attackers¿how they plan and execute malicious incursionsImplement hardware solutions as well as software safeguardsTake advantage of Apple's built-in macOS security features in addition to 3rd party toolsAvoid attacks on your system that could compromise sensitive corporate data and personally identifiable information Who This Book Is ForIT admins responsible for managing Mac device security. Additionally users of Apple products that may have some experience using the platform in general but are not versed in security, as well as, those switching from Windows platforms will find useful information here. And anyone that wishes to expand their information security skills and/or develop a security-focused mindset to better protect their personal information and privacy data from the numerous and growing threats in the wild, such as malware and phishing.

The popularity of Android mobile phones has attracted cybercriminals to create malware applications that carry out various malicious activities. This book will be highly useful for Android malware researchers, developers, students and cyber security professionals to explore and build defense mechanisms against Android malware.

Your one-stop resource to learn, configure and use Ubuntu 22.04 for your day-to-day operations and deployments.Purchase of the print or Kindle book includes a free eBook in PDF format.Key FeaturesGet well-versed with newly added features in Ubuntu 22.04Master the art of installing, managing, and troubleshooting Ubuntu ServerLeverage the improved performance and security-related aspects of Ubuntu Server 22.04Book DescriptionUbuntu Server is taking the server world by storm - and for a good reason! The server-focused spin of Ubuntu is a stable, flexible, and powerful enterprise-class distribution of Linux with a focus on running servers both small and large. Mastering Ubuntu Server is a book that will teach you everything you need to know in order to manage real Ubuntu-based servers in actual production deployments. This book will take you from initial installation to deploying production-ready solutions to empower your small office network, or even a full data center. You'll see examples of running an Ubuntu Server in the cloud, be walked through set up popular applications (such as Nextcloud), host your own websites, and deploy network resources such as DHCP, DNS, and others. You'll also see how to containerize applications via LXD to maximize efficiency and learn how to build Kubernetes clusters. This new fourth edition updates the popular book to cover Ubuntu 22.04 LTS, which takes advantage of the latest in Linux-based technologies. By the end of this Ubuntu book, you will have gained all the knowledge you need in order to work on real-life Ubuntu Server deployments and become an expert Ubuntu Server administrator who is well versed in its feature set.What you will learnInstall Ubuntu Server on physical servers and on the Raspberry PiDeploy Ubuntu Server in the cloud and host websites on your own serverDeploy your applications to their own containers and scale your infrastructureSet up popular applications such as NextcloudAutomate deployments and configuration with Ansible to save timeContainerize applications via LXD to maximize efficiencyDiscover best practices and troubleshooting techniquesWho this book is forThis book is for System Administrators, Site Reliability Engineers, DevOps professionals, enthusiasts, as well as for individuals looking to make a career change and learn the skills they'll need to work with Ubuntu servers. Prior knowledge of Ubuntu is not required but a basic understanding of basic computing concepts is assumed. Some IT administration, Linux, and shell scripting experience is preferred, although the first several chapters will bring newcomers up to speed as well.Table of ContentsDeploying Ubuntu ServerManaging Users and PermissionsManaging Software PackagesNavigating and Essential CommandsManaging Files and DirectoriesBoosting Your Command-line EfficiencyControlling and Managing ProcessesMonitoring System ResourcesManaging Storage VolumesConnecting to NetworksSetting Up Network ServicesSharing and Transferring FilesManaging DatabasesServing Web ContentAutomating Server Configuration with AnsibleVirtualizationRunning ContainersContainer OrchestrationDeploying Ubuntu in the CloudAutomating Cloud Deployments with TerraformSecuring Your ServerTroubleshooting Ubuntu ServersPreventing Disasters

Get inspired to explore the depths of the DevOps field. In today's rapidly transforming world, Infrastructure as Code (IaC) has emerged as an effective approach to maintain, scale, and deploy software systems. This book offers a mixture of foundational IaC concepts and practical examples to give you hands-on experience.You will first gain an understanding of DevOps culture as well as how to adapt to IaC. Introduction to Infrastructure as Code begins by reviewing the innovative features that DevOps in general, and IaC in particular, have to offer for adoption and growth for different verticals. With this solid base established, you will then learn the importance, processes, and outcome of building infrastructure solutions.Authors Sneh Pandya and Riya Guha Thakurta then provide hands-on examples utilizing IaC platforms, open source tools, and essential considerations such as security, scalability, and deployments. Each chapter focuses on one vertical (i.e., foundations, architecture patterns, securing infrastructure, preparing for deployment), how it impacts the DevOps toolchain in a holistic manner, and how it can be used to build solutions specific to that vertical, with a detailed walkthrough of code, environments, and other tools. After completing this book, you'll have launched your own infrastructure solution through an open source stack consisting of platforms and tools such as Terraform, Chef, and Puppet.What You Will LearnUnderstand the fundamentals of DevOps and Infrastructure as CodePrepare for the ever-evolving ecosystem of modular infrastructure and the needs of the futureAvoid potential pitfalls and breakdowns while working with infrastructureBuild scalable and efficient IaC solutions that work at a small, medium, and large scale in a real-life environmentUnderstand and be responsibly aware of security concerns related to the domain, and how to address themWho Is This Book ForBeginners interested in building a career in DevOps as well as professionals looking to gain expertise and advance their career with greater knowledge of IaC. including Technical Product Managers, and Architects.

Designed to accompany the 5th Edition of the companion text, Workbook for Diagnostic Medical Sonography: A Guide to Clinical Practice, Abdomen and Superficial Structures,5th Edition, by Diane M. Kawamura and Tanya D. Nolan, offers a full complement of self-study aids for active learning that enable you to assess and build your knowledge as you advance through the text. Most importantly, it helps you get the most out of your study time, with a variety of custom-designed exercises to help you master each objective.

Despite many uncertainties in cloud computing, one truth is evident: costs will always tend to go up unless youre actively engaged in the process. Whether youre new to managing cloud spend or a seasoned pro, this book will clarify the often misunderstood workings of cloud billing fundamentals and provide expert strategies on creating a culture of cloud cost management in your organization.Drawing on real-world examples of successes and failures of large-scale cloud spenders, this book outlines a road map for building a culture of FinOps in your organization. Beginning with the fundamental concepts required to understand cloud billing concepts, youll learn how to enable an efficient and effective FinOps machine.Learn how the cloud works when it comes to financial managementSet up a FinOps team and build a framework for making spend efficiency a priorityExamine the anatomy of a cloud bill and learn how to manage itGet operational recipes for maximizing cloud efficiencyUnderstand how to motivate engineering teams to take cost-saving actionsExplore the FinOps lifecycle: Inform, Optimize, and OperateLearn the DNA of a highly functional cloud FinOps culture

Pro Freeware and Open Source Solutions for Business is a practical guide for the small business owner seeking viable alternative to expensive commercial software packages and subscriptions. This comprehensive look at the powerful alternatives to expensive proprietary software provides an illustrated overview of no-cost software solutions.In this book you will find free and open source solutions for office productivity, PDF creation, accounting, image editing and graphic design, desktop publishing, 3D design, CAD, audio and video editing, website and blog creation, customer relationship management, point of sale, networking and security, and alternatives to the Windows and Macintosh operating systems. This guide helps free the cost-conscious business owner from the bonds of expensive proprietary software by exploring the free and powerful alternatives that exist. You can save a substantial sums of money by replacing just a few commercial software titles with free and open source solutions. Learn how with Pro Freeware and Open Source Solutions for Business today.

Teaches you how and what to study in order to be best prepared for the Certified OpenStack Administrator exam. This fast-growing technology is creating a market that needs more qualified IT specialists with proven skills. This book covers 100% of the exam requirements for both The OpenStack Foundation and the Mirantis OpenStack Certification Exam.Each theme is taught using practical exercises and instructions for the command line and for the graphical client (Horizon). Each chapter is followed by review questions, complete with answers. Even after you have taken and passed your OpenStack exam, this book will remain a useful reference. What You Will LearnUnderstand the components that make up the cloud.Install and make an OpenStack distribution from Mirantis, Red Hat or another community version.Work with OpenStack Identity Management, Dashboard, CLI, Object Storage, Block Storage, Networking, Telemetry, Orchestration, and Image Services.Learn how to troubleshoot all the main OpenStack services.Understand where to find information for future work with OpenStack.Who This Book Is ForCertified OpenStack Administrator Study Guide is for Cloud and Linux engineers looking for a better understanding of how to work with the modern OpenStack IaaS Cloud, and wants to prove their knowledge by passing a Certified OpenStack Administrator Exam. 

Gain insights into the different challenges that can be solved using Go, with a focus on containers, Linux, security, networking, user interfaces and other relevant cloud based topics. This book reviews the necessary tools to create container-based cloud solutions with Go, a programming language that was born out of the need to address scalable, high availability cloud computing architecture needs inside Google. Go, also known as Golang, has been adopted across different industries and products with many popular Open Source projects that power cloud computing technologies such as Docker and Kubernetes being written with Go. As the complexity of cloud technology increases, so does the need for people to understand how things work under-the-hood and to fix them when they¿re broken. What You Will LearnUnderstand how the various components of a container-based system worksTackle complex technical issues using GoIntegrate tools that can be used as part of your daily operational needsBuild system-based productsWho This Book Is For Developers and Engineers familiar with Go who want to know how different parts of the system work and who want to write command line tools. It will also be beneficial to programmers who already have a system-level understanding and want to use Go to build tools for existing projects and applications.

Explore Automated Market Makers (AMMs), the underlying protocols used by decentralized exchanges (DEX) to allow users to perform trades of cryptocurrencies in a decentralized way with no middlemen. This book provides a thorough study and a clear-cut exposition of the principal AMMs (Uniswap v2 and v3, Balancer, and Curve).You'll receive a detailed description of how these AMMs work, unveiling the mathematics behind them and showing plenty of examples as well as novel proofs for several interesting facts. Each chapter describes an AMM's core idea and derives the mathematical formulas used in the code, giving careful explanations of the logical thinking involved and detailing the steps needed to reach those formulas. All these explanations are complemented with thoughtfully chosen examples which further help to enlighten the readers on how the formulae work. In addition, the relevant parts of the codes of the AMMs are shown after explaining each formula sothat the actual implementation of the formulae can be seen.In a traditional trading market a buy order has to be matched with a sell order to achieve a trade. However, for an AMM, users trade against the protocol itself, a smart contract, or a community pool of funds. In simple terms this is an open source computer program in which mathematical formulas define prices. Automated Market Makers examines this critical point revealing that no banks or intermediaries are necessary, giving crucial financial access to a much larger crowd, regardless of who they are with less barriers to access.What You'll LearnUnderstand the principals of decentralized finance (DeFi)Grasp mathematical formulae that underpin decentralized exchangesWork with Solidity programming languageReview current industry best practices Who This Book Is ForThose new to Blockchain and Cryptocurrency trading, who want to learn more about AMMsDevelopers who want to dive deeper into the core features of AMM platformsInvestors and venture capitalists who want to know more about new emerging technologies

Create, edit, modify and convert multimedia files using FFmpeg, the most versatile open source audio and video processing tool available for Linux, Mac and Windows users. After reading this book, you will be able to work with video and audio files, images, text, animations, fonts, subtitles and metadata like a pro.It begins with a simple introduction to FFmpeg executables ¿ ffmpeg, ffprobe and ffplay, and explains how you can use them to process multimedia containers, streams, audio channels, maps and metadata. It then describes how you can easily edit, enhance and convert audio, video, image and text files. There are dedicated chapters for filters, audio, subtitles and metadata, as well as FFmpeg tips and tricks. Sample lists of FFmpeg filters, encoders, decoders, formats and codecs are also available as appendices.Quick Start Guide to FFmpeg is for anyone who needs to edit or process multimedia files including studio professionals, broadcast personnel, content creators, podcasters, librarians, archivists and webmasters. It will be indispensable for those wanting to process a variety of multimedia files from the command line and inside shell scripts or custom-built software.You Will Learn To:Convert from one format to another e.g. video-to-video, video-to-audio, video-to-image, image-to-video, video-to-animation, animation-to-video, text-to-audio, text-to-videoEdit video files by cutting them with and without re-encoding, appending, resizing, changing frame rate and aspect ratio, mixing in audioUse filters to rotate, flip, crop, overlay (side-by-side or inset), remove logos, blur, smooth and sharpen, apply transitions as well as speed up or down playbackEdit audio files by changing, normalizing or compressing volume, mixing and splitting channels and detecting silence. Also, learn to generate waveforms as video or imagesAdd subtitles, place them anywhere on the screen, use custom fonts and colors, and use different languagesLearn how to import, export and remove metadata, add MP3 tags (including album art), set global and stream-specific metadata, export and remove metadataThis Book For:Content creators and bloggers from professional studio employees to Youtubers and hobbyists who need to process their own multimedia content; multimedia archivists and librarians; regular Linux desktop users

Build solid software with modern and safe concurrency features. Concurrency is one of the hardest problems in computer science. For years, computer scientists and engineers have developed different strategies for dealing with concurrency. However, the original concurrency primitives are complicated and difficult to understand, and even harder to implement.Using the new async/await APIs in Swift, this book will explain how your code can abstract a lot of the complexity with a simpler interface so you never have to deal with concurrency primitives such as semaphores, locks, and threads yourself. This will allow you to write concurrent code that is easier to read, easier to write, and easier to maintain.  These new APIs are deeply ingrained into Swift, offering compile-level features that will keep you from writing dangerous concurrent code.You'll start by exploring why concurrency is hard to implement in a traditional system. Explaining the definition of concurrency and what its primitives are will help you understand why they are hard to use correctly. These concepts will become clearer as you work through the sample projects. The book's focus then shifts exclusively to the new APIs, helping you understand how the integration of the system with the language itself makes it easier for you to write concurrent code without overstepping the bounds of the concurrency safe zone.By the end of the book, you'll have a solid foundation for working safely with concurrent code using the new async/await APIs.What You'll LearnUnderstand concurrency and its traditional problems Work with the new async/await API and all its features, from the basic usage and await keywords, to task groups and async sequences.Implement modern and safe concurrent code that you can start using right awayWho This Book Is For  Experienced iOS developers at a semi-senior or senior level. Knowledge on the Grand Central Dispatch is a bonus, but not required.