Products related to Inventiveness:
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Linux Kernel Development
Linux Kernel Development details the design and implementation of the Linux kernel, presenting the content in a manner that is beneficial to those writing and developing kernel code, as well as to programmers seeking to better understand the operating system and become more efficient and productive in their coding. The book details the major subsystems and features of the Linux kernel, including its design, implementation, and interfaces.It covers the Linux kernel with both a practical and theoretical eye, which should appeal to readers with a variety of interests and needs. The author, a core kernel developer, shares valuable knowledge and experience on the 2.6 Linux kernel.Specific topics covered include process management, scheduling, time management and timers, the system call interface, memory addressing, memory management, the page cache, the VFS, kernel synchronization, portability concerns, and debugging techniques.This book covers the most interesting features of the Linux 2.6 kernel, including the CFS scheduler, preemptive kernel, block I/O layer, and I/O schedulers. The third edition of Linux Kernel Development includes new and updated material throughout the book: An all-new chapter on kernel data structuresDetails on interrupt handlers and bottom halvesExtended coverage of virtual memory and memory allocationTips on debugging the Linux kernelIn-depth coverage of kernel synchronization and lockingUseful insight into submitting kernel patches and working with the Linux kernel community
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Farming for the Long Haul : Resilience and the Lost Art of Agricultural Inventiveness
It’s all but certain that the next fifty years will bring enormous, not to say cataclysmic, disruptions to our present way of life.World oil reserves will be exhausted within that time frame, as will the lithium that powers today’s most sophisticated batteries, suggesting that transportation is equally imperiled. And there’s another, even more dire limitation that is looming: at current rates of erosion, the world’s topsoil will be gone in sixty years.Fresh water sources are in jeopardy, too. In short, the large-scale agricultural and food delivery system as we know it has at most a few decades before it exhausts itself and the planet with it. Farming for the Long Haul is about building a viable small farm economy that can withstand the economic, political, and climatic shock waves that the twenty-first century portends.It draws on the innovative work of contemporary farmers, but more than that, it shares the experiences of farming societies around the world that have maintained resilient agricultural systems over centuries of often-turbulent change.Indigenous agriculturalists, peasants, and traditional farmers have all created broad strategies for survival through good times and bad, and many of them prospered.They also developed particular techniques for managing soil, water, and other resources sustainably.Some of these techniques have been taken up by organic agriculture and permaculture, but many more of them are virtually unknown, even among alternative farmers.This book lays out some of these strategies and presents techniques and tools that might prove most useful to farmers today and in the uncertain future.
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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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Understanding the Linux Kernel
In order to thoroughly understand what makes Linux tick and why it works so well on a wide variety of systems, you need to delve deep into the heart of the kernel.The kernel handles all interactions between the CPU and the external world, and determines which programs will share processor time, in what order.It manages limited memory so well that hundreds of processes can share the system efficiently, and expertly organizes data transfers so that the CPU isn't kept waiting any longer than necessary for the relatively slow disks.The third edition of Understanding the Linux Kernel takes you on a guided tour of the most significant data structures, algorithms, and programming tricks used in the kernel.Probing beyond superficial features, the authors offer valuable insights to people who want to know how things really work inside their machine. Important Intel-specific features are discussed. Relevant segments of code are dissected line by line.But the book covers more than just the functioning of the code; it explains the theoretical underpinnings of why Linux does things the way it does.This edition of the book covers Version 2.6, which has seen significant changes to nearly every kernel subsystem, particularly in the areas of memory management and block devices.The book focuses on the following topics: * Memory management, including file buffering, process swapping, and Direct memory Access (DMA) * The Virtual Filesystem layer and the Second and Third Extended Filesystems * Process creation and scheduling * Signals, interrupts, and the essential interfaces to device drivers * Timing * Synchronization within the kernel * Interprocess Communication (IPC) * Program execution Understanding the Linux Kernel will acquaint you with all the inner workings of Linux, but it's more than just an academic exercise.You'll learn what conditions bring out Linux's best performance, and you'll see how it meets the challenge of providing good system response during process scheduling, file access, and memory management in a wide variety of environments.This book will help you make the most of your Linux system.
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Linux System Programming
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The Linux Programming Interface
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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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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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How can one downgrade the Linux kernel?
To downgrade the Linux kernel, you can follow these steps: 1. First, identify the version of the kernel you want to downgrade to and make sure it is available in your distribution's package repository. 2. Next, use the package manager of your Linux distribution to remove the current kernel version. For example, in Ubuntu, you can use the command `sudo apt-get remove linux-image-<version>`. 3. Then, install the desired kernel version using the package manager. For example, in Ubuntu, you can use the command `sudo apt-get install linux-image-<desired_version>`. 4. Finally, reboot your system to load the downgraded kernel. Keep in mind that downgrading the kernel may have implications for system stability and compatibility with hardware and software, so it's important to carefully consider the reasons for downgrading and to backup important data before proceeding.
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What makes the Linux kernel so special?
The Linux kernel is special for several reasons. Firstly, it is open-source, meaning that its source code is freely available for anyone to use, modify, and distribute. This has led to a large and active community of developers constantly improving and updating the kernel. Additionally, the Linux kernel is highly customizable and can be tailored to specific needs, making it suitable for a wide range of devices and systems. Finally, the Linux kernel is known for its stability, security, and performance, making it a popular choice for servers, embedded systems, and other critical applications.
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Why can't the Linux kernel be loaded?
The Linux kernel cannot be loaded because it is a fundamental part of the operating system that needs to be present in memory before any other software can run. The kernel is responsible for managing the system's resources, such as memory, CPU, and devices, and it provides essential services for other software to function. Without the kernel, the operating system cannot start and the computer cannot run any programs. Therefore, the kernel needs to be loaded into memory during the boot process in order for the operating system to become operational.
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How can I activate a newer Linux kernel?
To activate a newer Linux kernel, you can follow these steps: 1. Download the desired kernel version from the official Linux kernel website. 2. Compile the kernel source code on your system using the appropriate tools and configurations. 3. Install the newly compiled kernel on your system and update the bootloader configuration to boot from the new kernel. 4. Reboot your system to activate the newer Linux kernel.
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How can one use Linux Ubuntu for programming server applications and similar tasks?
To use Linux Ubuntu for programming server applications and similar tasks, one can start by installing the necessary programming languages and tools such as Python, Ruby, Node.js, or Java. Ubuntu's package manager, apt, can be used to easily install these tools. Next, one can set up a development environment by installing a text editor or an integrated development environment (IDE) such as Visual Studio Code or IntelliJ IDEA. Additionally, Ubuntu's terminal can be used to run server applications and manage the server environment. Finally, one can utilize Ubuntu's robust networking capabilities to configure and manage server applications, such as setting up web servers, databases, and other server-related tasks.
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How can one simulate a kernel panic in Linux?
To simulate a kernel panic in Linux, you can use the Magic SysRq key. First, you need to enable the Magic SysRq key by setting the value of /proc/sys/kernel/sysrq to 1. Then, you can trigger a kernel panic by pressing Alt + SysRq + C. This will cause the system to crash and display a kernel panic message. It is important to note that triggering a kernel panic should only be done for testing purposes and can result in data loss.
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How can I stop pinging in the Linux kernel?
To stop pinging in the Linux kernel, you can disable the ICMP echo requests by modifying the kernel parameters. You can do this by setting the value of `icmp_echo_ignore_all` to 1 in the `/proc/sys/net/ipv4/` directory. This will prevent the kernel from responding to ping requests. Additionally, you can also use firewall rules to block incoming ICMP echo requests.
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