Gain a firm practical understanding of the fundamentals of Linux kernel internals, learn to write high-quality kernel module code, and kernel synchronization Key Features * Discover how to write Linux kernel and module code for real-world products * Implement industry-grade techniques in real-world scenarios for fast, efficient memory allocation and data synchronization * Understand and exploit kernel architecture, CPU scheduling, and kernel synchronization techniques Book Description The 2nd Edition of Linux Kernel Programming is an updated, comprehensive introduction for new programmers to the Linux kernel. This book uses the recent 5.10 Long-Term Support (LTS) Linux kernel series, which will be maintained until 2026, showing 5.X/6.X new features. In this new edition, you'll start the journey by learning how to build the kernel from source, including doing a kernel build for the popular Raspberry Pi. You'll then learn, step by step, how to write your first kernel module by leveraging the kernel's powerful Loadable Kernel Module (LKM) framework. You'll then get to delve into key kernel internals topics including Linux kernel architecture, memory management, and CPU scheduling. You'll understand the deep issues of concurrency, and gain insight into how they can be addressed with various locking technologies (mutexes, spinlocks, atomic / refcount operators and even lock-free technologies). By the end of this 2nd Edition book, you'll have a better understanding of the fundamentals of writing Linux kernel and kernel module code that can be used in real-world projects and products. What you will learn * Configure and build the 5.10 / 6.x kernels from source * Write high-quality modular kernel code (LKM framework) for 5.10 / 6.x kernels * Explore the Linux kernel architecture * Get to grips with key internals details regarding memory management within the kernel * Understand and work with various dynamic kernel memory alloc/dealloc APIs * Discover key internals aspects regarding CPU scheduling within the kernel * Gain a deeper understanding of kernel concurrency issues * Learn how to work with key kernel synchronization primitives Who This Book Is For This book is for beginner Linux programmers and developers looking to get started with Linux kernel, providing a knowledge base to understand required kernel internal topics and overcome frequent and common development issues. A basic understanding of Linux CLI and C programming is assumed

Windows or Mac OS X users are often daunted by the Linux operating system. And yet learning Linux doesn't have to be hard and the payoff is great. Linux is secure, flexible, and free. It's less susceptible to malicious attacks, and when it is, patches are available quickly. And best of all, Linux allows users access to different desktop interfaces and loads of software, almost all of it completely free. Learn Linux in a Month of Lunches shows readers how to install and use Linux for all the things they need to do, like connecting to a network, installing software, and securing your system. Written for readers who are curious about Linux or have to get up and running for a job. This book concentrates on the tasks Linux users need to know how to do. In easy-to-follow lessons designed to take an hour or less, readers learn how to use the command line, along with practical topics like installing software, customizing your desktop, printing, and even basic networking. Readers will find a road map to the commands and processes they need to be instantly productive. Key Features: * Go from Linux novice to expert in just one month * Short, easy-to-follow lessons * Teaches the must-know commands and processes * Covers the most useful Linux topics AUDIENCE This book is for anyone looking to learn how to use Linux ABOUT THE TECHNOLOGY Linux is a free, popular, widely supported, open-source operating system based on UNIX.

Gain a firm practical understanding of how to secure your Linux system from intruders, malware attacks, and other cyber threats Key Features * Discover security techniques to prevent malware from infecting a Linux system, and detect it * Prevent unauthorized people from breaking into a Linux system * Protect important and sensitive data from being revealed to unauthorized persons Book Description The third edition of Mastering Linux Security and Hardening is an updated, comprehensive introduction to implementing the latest Linux security measures, using the latest versions of Ubuntu and AlmaLinux. In this new edition, you will learn how to set up a practice lab, create user accounts with appropriate privilege levels, protect sensitive data with permissions settings and encryption, and configure a firewall with the newest firewall technologies. You'll also explore how to use sudo to set up administrative accounts with only the privileges required to do a specific job, and you'll get a peek at the new sudo features that have been added over the past couple of years. You'll also see updated information on how to set up a local certificate authority for both Ubuntu and AlmaLinux, as well as how to automate system auditing. Other important skills that you'll learn include how to automatically harden systems with OpenSCAP, audit systems with auditd, harden the Linux kernel configuration, protect your systems from malware, and perform vulnerability scans of your systems. As a bonus, you'll see how to use Security Onion to set up an Intrusion Detection System. By the end of this new edition, you will confidently be able to set up a Linux server that will be secure and harder for malicious actors to compromise. What you will learn * Prevent malicious actors from compromising a production Linux system * Leverage additional features and capabilities of Linux in this new version * Use locked-down home directories and strong passwords to create user accounts * Prevent unauthorized people from breaking into a Linux system * Configure file and directory permissions to protect sensitive data * Harden the Secure Shell service in order to prevent break-ins and data loss * Apply security templates and set up auditing Who This Book Is For This book is for Linux administrators, system administrators, and network engineers interested in securing moderate to complex Linux environments. Security consultants looking to enhance their Linux security skills will also find this book useful. Working experience with the Linux command line and package management is necessary to understand the concepts covered in this book.

Gain an understanding of system administration that will remain applicable throughout your career and understand why tasks are done rather than how to do them Key Features Deploy, secure, and maintain your Linux system in the best possible way Discover best practices to implement core system administration tasks in Linux Explore real-world decisions, tasks, and solutions involved in Linux system administration Book DescriptionLinux is a well-known, open source Unix-family operating system that is the most widely used OS today. Linux looks set for a bright future for decades to come, but system administration is rarely studied beyond learning rote tasks or following vendor guidelines. To truly excel at Linux administration, you need to understand how these systems work and learn to make strategic decisions regarding them. Linux Administration Best Practices helps you to explore best practices for efficiently administering Linux systems and servers. This Linux book covers a wide variety of topics from installation and deployment through to managing permissions, with each topic beginning with an overview of the key concepts followed by practical examples of best practices and solutions. You'll find out how to approach system administration, Linux, and IT in general, put technology into proper business context, and rethink your approach to technical decision making. Finally, the book concludes by helping you to understand best practices for troubleshooting Linux systems and servers that'll enable you to grow in your career as well as in any aspect of IT and business. By the end of this Linux administration book, you'll have gained the knowledge needed to take your Linux administration skills to the next level. What you will learn Find out how to conceptualize the system administrator role Understand the key values of risk assessment in administration Apply technical skills to the IT business context Discover best practices for working with Linux specific system technologies Understand the reasoning behind system administration best practices Develop out-of-the-box thinking for everything from reboots to backups to triage Prioritize, triage, and plan for disasters and recoveries Discover the psychology behind administration duties Who this book is forThis book is for anyone looking to fully understand the role and practices of being a professional system administrator, as well as for system engineers, system administrators, and anyone in IT or management who wants to understand the administration career path. The book assumes a basic understanding of Linux, including the command line, and an understanding of how to research individual tasks. Basic working knowledge of Linux systems and servers is expected.

Practical and actionable recipes for using shell and command-line scripting on your Linux OS with confidence Key Features Learn how to use the command line and write and debug Linux Shell scripts Automate complex repetitive tasks and backups, and learn networking and security A practical approach to system administration, and virtual machine and software management Book DescriptionLinux Command Line and Shell Scripting Techniques begins by taking you through the basics of the shell and command-line utilities. You'll start by exploring shell commands for file, directory, service, package, and process management. Next, you'll learn about networking - network, firewall and DNS client configuration, ssh, scp, rsync, and vsftpd, as well as some network troubleshooting tools. You'll also focus on using the command line to find and manipulate text content, via commands such as cut, egrep, and sed. As you progress, you'll learn how to use shell scripting. You'll understand the basics - input and output, along with various programming concepts such as loops, variables, arguments, functions, and arrays. Later, you'll learn about shell script interaction and troubleshooting, before covering a wide range of examples of complete shell scripts, varying from network and firewall configuration, through to backup and concepts for creating live environments. This includes examples of performing scripted virtual machine installation and administration, LAMP (Linux, Apache, MySQL, PHP) stack provisioning and bulk user creation for testing environments. By the end of this Linux book, you'll have gained the knowledge and confidence you need to use shell and command-line scripts. What you will learn Get an introduction to the command line, text editors, and shell scripting Focus on regular expressions, file handling, and automating complex tasks Automate common administrative tasks Become well-versed with networking and system security scripting Get to grips with repository management and network-based file synchronization Use loops, arguments, functions, and arrays for task automation Who this book is forThis book is for anyone looking to learn about Linux administration via CLI and scripting. Those with no Linux command-line interface (CLI) experience will benefit from it by learning from scratch. More experienced Linux administrators or engineers will also find this book useful, as it will help them organize their knowledge, fill in any gaps, and work efficiently with shell scripts to increase productivity.

Effectively debug kernel modules, device drivers, and the kernel itself by gaining a solid understanding of powerful open source tools and advanced kernel debugging techniques Key Features Fully understand how to use a variety of kernel and module debugging tools and techniques using examples Learn to expertly interpret a kernel Oops and identify underlying defect(s) Use easy-to-look up tables and clear explanations of kernel-level defects to make this complex topic easy Book DescriptionThe Linux kernel is at the very core of arguably the world's best production-quality OS. Debugging it, though, can be a complex endeavor. Linux Kernel Debugging is a comprehensive guide to learning all about advanced kernel debugging. This book covers many areas in-depth, such as instrumentation-based debugging techniques (printk and the dynamic debug framework), and shows you how to use Kprobes. Memory-related bugs tend to be a nightmare - two chapters are packed with tools and techniques devoted to debugging them. When the kernel gifts you an Oops, how exactly do you interpret it to be able to debug the underlying issue? We've got you covered. Concurrency tends to be an inherently complex topic, so a chapter on lock debugging will help you to learn precisely what data races are, including using KCSAN to detect them. Some thorny issues, both debug- and performance-wise, require detailed kernel-level tracing; you'll learn to wield the impressive power of Ftrace and its frontends. You'll also discover how to handle kernel lockups, hangs, and the dreaded kernel panic, as well as leverage the venerable GDB tool within the kernel (KGDB), along with much more. By the end of this book, you will have at your disposal a wide range of powerful kernel debugging tools and techniques, along with a keen sense of when to use which. What you will learn Explore instrumentation-based printk along with the powerful dynamic debug framework Use static and dynamic Kprobes to trap into kernel/module functions Catch kernel memory defects with KASAN, UBSAN, SLUB debug, and kmemleak Interpret an Oops in depth and precisely identify it's source location Understand data races and use KCSAN to catch evasive concurrency defects Leverage Ftrace and trace-cmd to trace the kernel flow in great detail Write a custom kernel panic handler and detect kernel lockups and hangs Use KGDB to single-step and debug kernel/module source code Who this book is forThis book is for Linux kernel developers, module/driver authors, and testers interested in debugging and enhancing their Linux systems at the level of the kernel. System administrators who want to understand and debug the internal infrastructure of their Linux kernels will also find this book useful. A good grasp on C programming and the Linux command line is necessary. Some experience with kernel (module) development will help you follow along.

Develop the skills required to administer your RHEL environment on-premises and in the cloud while preparing for the RHCSA exam Purchase of the print or Kindle book includes a free eBook in PDF format Key Features Become a pro at system administration from installation to container management Secure and harden your Linux environment using SSH, SELinux, firewall, and system permissions Gain confidence to pass the RHCSA exam with the help of practice tests Book DescriptionWith Red Hat Enterprise Linux 9 becoming the standard for enterprise Linux used from data centers to the cloud, Linux administration skills are in high demand. With this book, you'll learn how to deploy, access, tweak, and improve enterprise services on any system on any cloud running Red Hat Enterprise Linux 9. Throughout the book, you'll get to grips with essential tasks such as configuring and maintaining systems, including software installation, updates, and core services. You'll also understand how to configure the local storage using partitions and logical volumes, as well as assign and deduplicate storage. You'll learn how to deploy systems while also making them secure and reliable. This book provides a base for users who plan to become full-time Linux system administrators by presenting key command-line concepts and enterprise-level tools, along with essential tools for handling files, directories, command-line environments, and documentation for creating simple shell scripts or running commands. With the help of command line examples and practical tips, you'll learn by doing and save yourself a lot of time. By the end of the book, you'll have gained the confidence to manage the filesystem, users, storage, network connectivity, security, and software in RHEL 9 systems on any footprint. What you will learn Become well versed with the fundamentals of RHEL9-from system deployment to user management Secure a system by using SELinux policies and configuring firewall rules Understand LVM to manage volumes and maintain VDO deduplication Manage a system remotely using SSH and public key authentication Get the hang of the boot process and kernel tunable to adjust your systems Automate simple tasks using scripts or Ansible Playbooks Who this book is forThis book is for Red Hat Enterprise Linux system administrators and Linux system administrators. It's also a good resource for any IT professional who wants to learn system administration. RHCSA certification candidates will find this book useful in their preparation for the certification exam.

Your one-stop resource to learn, configure and use Ubuntu 22.04 for your day-to-day operations and deployments Key Features Get well-versed with newly added features in Ubuntu 22.04 Master the art of installing, managing, and troubleshooting Ubuntu Server Leverage the improved performance and security-related aspects of Ubuntu Server 22.04 Book 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 learn Install Ubuntu Server on physical servers and on the Raspberry Pi Deploy Ubuntu Server in the cloud and host websites on your own server Deploy your applications to their own containers and scale your infrastructure Set up popular applications such as Nextcloud Automate deployments and configuration with Ansible to save time Containerize applications via LXD to maximize efficiency Discover best practices and troubleshooting techniques Who 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.

Ever wished you could spy on your computer with a handy incantation or bewitch your programs to debug themselves - now you can by becoming a Linux wizard! Okay, reading these zines won't actually make you a wizard, but you'll sure feel like one after you learn some neat Linux tricks. With this collected edition of Julia Evans's wildly popular Linux zines, you'll view programming in a way you never have before - now on fancier paper!

Discover expert guidance for moving on-premises virtual machines running on Linux servers to Azure by implementing best practices and optimizing costs Key Features Work with real-life migrations to understand the dos and don'ts of the process Deploy a new Linux virtual machine and perform automation and configuration management Get to grips with debugging your system and collecting error logs with the help of hands-on examples Book DescriptionWith cloud adoption at the core of digital transformation for organizations, there has been a significant demand for deploying and hosting enterprise business workloads in the cloud. Migrating Linux to Microsoft Azure offers a wealth of actionable insights into deploying Linux workload to Azure. You'll begin by learning about the history of IT, operating systems, Unix, Linux, and Windows before moving on to look at the cloud and what things were like before virtualization. This will help anyone new to Linux become familiar with the terms used throughout the book. You'll then explore popular Linux distributions, including RHEL 7, RHEL 8, SLES, Ubuntu Pro, CentOS 7, and more. As you progress, you'll cover the technical details of Linux workloads such as LAMP, Java, and SAP, and understand how to assess your current environment and prepare for your migration to Azure through cloud governance and operations planning. Finally, you'll go through the execution of a real-world migration project and learn how to analyze and debug some common problems that Linux on Azure users may encounter. By the end of this Linux book, you'll be proficient at performing an effective migration of Linux workloads to Azure for your organization. What you will learn Grasp the terminology and technology of various Linux distributions Understand the technical support co-operation between Microsoft and commercial Linux vendors Assess current workloads by using Azure Migrate Plan cloud governance and operations Execute a real-world migration project Manage project, staffing, and customer engagement Who this book is forThis book is for cloud architects, cloud solution providers, and any stakeholders dealing with migration of Linux workload to Azure. Basic familiarity with Microsoft Azure would be a plus.

Leverage Azure's cloud capabilities to find the most optimized path to meet your firm's cloud infrastructure needs Key Features Get to grips with the core Azure infrastructure technologies and solutions Develop the ability to opt for cloud design and architecture that best fits your organization Cover the entire spectrum of cloud migration from planning to implementation and best practices Book DescriptionMicrosoft Azure is a powerful cloud computing platform that offers a multitude of services and capabilities for organizations of any size moving to a cloud strategy. This fourth edition comes with the latest updates on cloud security fundamentals, hybrid cloud, cloud migration, Microsoft Azure Active Directory, and Windows Virtual Desktop. It encapsulates the entire spectrum of measures involved in Azure deployment that includes understanding Azure fundamentals, choosing a suitable cloud architecture, building on design principles, becoming familiar with Azure DevOps, and learning best practices for optimization and management. The book begins by introducing you to the Azure cloud platform and demonstrating the substantial scope of digital transformation and innovation that can be achieved with Azure's capabilities. The guide also acquaints you with practical insights into application modernization, Azure Infrastructure as a Service (IaaS) deployment, infrastructure management, key application architectures, best practices of Azure DevOps, and Azure automation. By the end of this book, you will have acquired the skills required to drive Azure operations from the planning and cloud migration stage to cost management and troubleshooting. What you will learn Understand core Azure infrastructure technologies and solutions Carry out detailed planning for migrating applications to the cloud with Azure Deploy and run Azure infrastructure services Define roles and responsibilities in DevOps Get a firm grip on Azure security fundamentals Carry out cost optimization in Azure Who this book is forThis book is designed to benefit Azure architects, cloud solution architects, Azure developers, Azure administrators, and anyone who wants to develop expertise in operating and administering the Azure cloud. Basic familiarity with operating systems and databases will help you grasp the concepts covered in this book.

Develop advanced skills for working with Linux systems on-premises and in the cloud Key Features Become proficient in everyday Linux administration tasks by mastering the Linux command line and using automation Work with the Linux filesystem, packages, users, processes, and daemons Deploy Linux to the cloud with AWS, Azure, and Kubernetes Book DescriptionLinux plays a significant role in modern data center management and provides great versatility in deploying and managing your workloads on-premises and in the cloud. This book covers the important topics you need to know about for your everyday Linux administration tasks. The book starts by helping you understand the Linux command line and how to work with files, packages, and filesystems. You'll then begin administering network services and hardening security, and learn about cloud computing, containers, and orchestration. Once you've learned how to work with the command line, you'll explore the essential Linux commands for managing users, processes, and daemons and discover how to secure your Linux environment using application security frameworks and firewall managers. As you advance through the chapters, you'll work with containers, hypervisors, virtual machines, Ansible, and Kubernetes. You'll also learn how to deploy Linux to the cloud using AWS and Azure. By the end of this Linux book, you'll be well-versed with Linux and have mastered everyday administrative tasks using workflows spanning from on-premises to the cloud. If you also find yourself adopting DevOps practices in the process, we'll consider our mission accomplished. What you will learn Understand how Linux works and learn basic to advanced Linux administration skills Explore the most widely used commands for managing the Linux filesystem, network, security, and more Get to grips with different networking and messaging protocols Find out how Linux security works and how to configure SELinux, AppArmor, and Linux iptables Work with virtual machines and containers and understand container orchestration with Kubernetes Work with containerized workflows using Docker and Kubernetes Automate your configuration management workloads with Ansible Who this book is forIf you are a Linux administrator who wants to understand the fundamentals and as well as modern concepts of Linux system administration, this book is for you. Windows System Administrators looking to extend their knowledge to the Linux OS will also benefit from this book.