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Learning eBPF : Programming the Linux Kernel for Enhanced Observability, Networking, and Security
What is eBPF? With this revolutionary technology, you can write custom code that dynamically changes the way the kernel behaves.It's an extraordinary platform for building a whole new generation of security, observability, and networking tools. This practical book is ideal for developers, system administrators, operators, and students who are curious about eBPF and want to know how it works.Author Liz Rice, chief open source officer with cloud native networking and security specialists Isovalent, also provides a foundation for those who want to explore writing eBPF programs themselves. With this book, you will:Learn why eBPF has become so important in the past couple of yearsWrite basic eBPF code, and manipulate eBPF programs and attach them to eventsExplore how eBPF components interact with Linux to dynamically change the operating system's behaviorLearn how tools based on eBPF can instrument applications without changes to the apps or their configurationDiscover how this technology enables new tools for observability, security, and networking
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Mastering Embedded Linux Programming
Harness the power of Linux to create versatile and robust embedded solutionsAbout This Book• Create efficient and secure embedded devices using Linux• Minimize project costs by using open source tools and programs• Explore each component technology in depth, using sample implementations as a guideWho This Book Is ForThis book is ideal for Linux developers and system programmers who are already familiar with embedded systems and who want to know how to create best-in-class devices.A basic understanding of C programming and experience with systems programming is needed. What You Will Learn• Understand the role of the Linux kernel and select an appropriate role for your application• Use Buildroot and Yocto to create embedded Linux systems quickly and efficiently• Create customized bootloaders using U-Boot• Employ perf and ftrace to identify performance bottlenecks• Understand device trees and make changes to accommodate new hardware on your device• Write applications that interact with Linux device drivers• Design and write multi-threaded applications using POSIX threads• Measure real-time latencies and tune the Linux kernel to minimize themIn DetailMastering Embedded Linux Programming takes you through the product cycle and gives you an in-depth description of the components and options that are available at each stage.You will begin by learning about toolchains, bootloaders, the Linux kernel, and how to configure a root filesystem to create a basic working device.You will then learn how to use the two most commonly used build systems, Buildroot and Yocto, to speed up and simplify the development process.Building on this solid base, the next section considers how to make best use of raw NAND/NOR flash memory and managed flash eMMC chips, including mechanisms for increasing the lifetime of the devices and to perform reliable in-field updates.Next, you need to consider what techniques are best suited to writing applications for your device.We will then see how functions are split between processes and the usage of POSIX threads, which have a big impact on the responsiveness and performance of the final device The closing sections look at the techniques available to developers for profiling and tracing applications and kernel code using perf and ftrace. Style and approach This book is an easy-to-follow and pragmatic guide consisting of an in-depth analysis of the implementation of embedded devices.Each topic has a logical approach to it; this coupled with hints and best practices helps you understand embedded Linux better.
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The Linux Programming Interface
The Linux Programming Interface (TLPI) is the definitive guide to the Linux and UNIX programming interface the interface employed by nearly every application that runs on a Linux or UNIX system.In this authoritative work, Linux programming expert Michael Kerrisk provides detailed descriptions of the system calls and library functions that you need in order to master the craft of system programming, and accompanies his explanations with clear, complete example programs.You'll find descriptions of over 500 system calls and library functions, and more than 200 example programs, 88 tables, and 115 diagrams.You'll learn how to: Read and write files efficiently Use signals, clocks, and timers Create processes and execute programs Write secure programs Write multithreaded programs using POSIX threads Build and use shared libraries Perform interprocess communication using pipes, message queues, shared memory, and semaphores Write network applications with the sockets API While The Linux Programming Interface covers a wealth of Linux-specific features, including epoll, inotify, and the /proc file system, its emphasis on UNIX standards (POSIX.1-2001/SUSv3 and POSIX.1-2008/SUSv4) makes it equally valuable to programmers working on other UNIX platforms.The Linux Programming Interface is the most comprehensive single-volume work on the Linux and UNIX programming interface, and a book that's destined to become a new classic.The Linux Programming Interface (TLPI) is the definitive guide to the Linux and UNIX programming interface the interface employed by nearly every application that runs on a Linux or UNIX system.In this authoritative work, Linux programming expert Michael Kerrisk provides detailed descriptions of the system calls and library functions that you need in order to master the craft of system programming, and accompanies his explanations with clear, complete example programs.You'll find descriptions of over 500 system calls and library functions, and more than 200 example programs, 88 tables, and 115 diagrams.You'll learn how to: Read and write files efficiently Use signals, clocks, and timers Create processes and execute programs Write secure programs Write multithreaded programs using POSIX threads Build and use shared libraries Perform interprocess communication using pipes, message queues, shared memory, and semaphores Write network applications with the sockets API While The Linux Programming Interface covers a wealth of Linux-specific features, including epoll, inotify, and the /proc file system, its emphasis on UNIX standards (POSIX.1-2001/SUSv3 and POSIX.1-2008/SUSv4) makes it equally valuable to programmers working on other UNIX platforms.The Linux Programming Interface is the most comprehensive single-volume work on the Linux and UNIX programming interface, and a book that's destined to become a new classic.
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Which distro do you use, Linux users?
As an AI, I do not have personal preferences or the ability to use operating systems. However, Linux users often choose their distribution based on their specific needs and preferences. Some popular distributions include Ubuntu for its user-friendly interface, Fedora for its focus on the latest technologies, and Debian for its stability and reliability. Ultimately, the choice of distribution depends on the user's requirements and level of expertise.
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Which fitness tracker or fitness band is the best?
The best fitness tracker or fitness band ultimately depends on individual preferences and needs. Some popular options include the Fitbit Charge 4, Garmin Vivosmart 4, and Apple Watch Series 6. Factors to consider when choosing the best fitness tracker include features like heart rate monitoring, GPS tracking, sleep tracking, and compatibility with your smartphone. It's important to research and compare different models to find the one that best suits your fitness goals and lifestyle.
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Soccer or fitness?
Choosing between soccer and fitness depends on your personal preferences and goals. If you enjoy team sports, competition, and the social aspect of playing with others, soccer may be the better choice for you. On the other hand, if you prefer individual workouts, setting personal fitness goals, and focusing on improving your overall health and well-being, then fitness activities might be more suitable. Ultimately, the decision should be based on what brings you the most enjoyment and motivation to stay active.
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'Soccer or fitness?'
Choosing between soccer and fitness depends on your personal preferences and goals. If you enjoy team sports, competition, and the social aspect of playing with others, soccer may be the better choice for you. On the other hand, if you prefer individual workouts, setting personal fitness goals, and focusing on overall health and well-being, then fitness activities might be more suitable. Ultimately, the decision should be based on what brings you the most enjoyment and fulfillment.
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'Fitness or boxing?'
It ultimately depends on individual preferences and goals. Fitness encompasses a wide range of activities and can include aspects of boxing, such as cardio workouts and strength training. Boxing, on the other hand, is a specific sport that involves skill development and technique training. Those looking for a full-body workout and stress relief may prefer boxing, while others may prefer the variety and flexibility of a general fitness routine. Both options offer physical and mental benefits, so it's important to choose the one that aligns with personal interests and fitness goals.
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Which fitness watch?
When choosing a fitness watch, it's important to consider your specific needs and preferences. Some popular options include the Apple Watch for its seamless integration with other Apple products and comprehensive health tracking features. The Fitbit Versa is another popular choice known for its affordability and accurate fitness tracking capabilities. Garmin watches are also highly regarded for their advanced GPS and sports tracking features, making them a great option for outdoor enthusiasts and athletes. Ultimately, the best fitness watch for you will depend on your budget, desired features, and preferred design.
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'Relationship or Fitness?'
It ultimately depends on individual priorities and values. Some people may prioritize their relationships and prioritize spending time with their partner, family, and friends over fitness. Others may prioritize their fitness and prioritize their physical health and well-being over spending time with others. It's important to find a balance that works for you and to communicate with your partner or loved ones about your priorities and how you can support each other in achieving them.
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How can one perform fitness exercises without a fitness mat?
One can perform fitness exercises without a fitness mat by using a towel or a blanket as a makeshift mat. This can provide some cushioning and support for exercises like push-ups, planks, and sit-ups. Additionally, exercising on a carpeted surface can also provide some padding and support for bodyweight exercises. It's important to be mindful of the surface being used and to listen to the body's feedback to avoid discomfort or injury.
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