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| bash floating point math: Bash Cookbook Carl Albing, JP Vossen, Cameron Newham, 2007-05-24 The key to mastering any Unix system, especially Linux and Mac OS X, is a thorough knowledge of shell scripting. Scripting is a way to harness and customize the power of any Unix system, and it's an essential skill for any Unix users, including system administrators and professional OS X developers. But beneath this simple promise lies a treacherous ocean of variations in Unix commands and standards. bash Cookbook teaches shell scripting the way Unix masters practice the craft. It presents a variety of recipes and tricks for all levels of shell programmers so that anyone can become a proficient user of the most common Unix shell -- the bash shell -- and cygwin or other popular Unix emulation packages. Packed full of useful scripts, along with examples that explain how to create better scripts, this new cookbook gives professionals and power users everything they need to automate routine tasks and enable them to truly manage their systems -- rather than have their systems manage them. |
| bash floating point math: bash Cookbook Carl Albing, JP Vossen, Cameron Newham, 2007-05-24 The key to mastering any Unix system, especially Linux and Mac OS X, is a thorough knowledge of shell scripting. Scripting is a way to harness and customize the power of any Unix system, and it's an essential skill for any Unix users, including system administrators and professional OS X developers. But beneath this simple promise lies a treacherous ocean of variations in Unix commands and standards. bash Cookbook teaches shell scripting the way Unix masters practice the craft. It presents a variety of recipes and tricks for all levels of shell programmers so that anyone can become a proficient user of the most common Unix shell -- the bash shell -- and cygwin or other popular Unix emulation packages. Packed full of useful scripts, along with examples that explain how to create better scripts, this new cookbook gives professionals and power users everything they need to automate routine tasks and enable them to truly manage their systems -- rather than have their systems manage them. |
| bash floating point math: Bash Quick Start Guide Tom Ryder, 2018-09-28 Learn how to write shell script effectively with Bash, to quickly and easily write powerful scripts to manage processes, automate tasks, and to redirect and filter program input and output in useful and novel ways. Key FeaturesDemystify the Bash command lineWrite shell scripts safely and effectivelySpeed up and automate your daily workBook Description Bash and shell script programming is central to using Linux, but it has many peculiar properties that are hard to understand and unfamiliar to many programmers, with a lot of misleading and even risky information online. Bash Quick Start Guide tackles these problems head on, and shows you the best practices of shell script programming. This book teaches effective shell script programming with Bash, and is ideal for people who may have used its command line but never really learned it in depth. This book will show you how even simple programming constructs in the shell can speed up and automate any kind of daily command-line work. For people who need to use the command line regularly in their daily work, this book provides practical advice for using the command-line shell beyond merely typing or copy-pasting commands into the shell. Readers will learn techniques suitable for automating processes and controlling processes, on both servers and workstations, whether for single command lines or long and complex scripts. The book even includes information on configuring your own shell environment to suit your workflow, and provides a running start for interpreting Bash scripts written by others. What you will learnUnderstand where the Bash shell fits in the system administration and programming worldsUse the interactive Bash command line effectivelyGet to grips with the structure of a Bash command lineMaster pattern-matching and transforming text with BashFilter and redirect program input and outputWrite shell scripts safely and effectivelyWho this book is for People who use the command line on Unix and Linux servers already, but don't write primarily in Bash. This book is ideal for people who've been using a scripting language such as Python, JavaScript or PHP, and would like to understand and use Bash more effectively. |
| bash floating point math: The Ultimate Linux Shell Scripting Guide Donald A. Tevault, 2024-10-18 Master Linux Shells – Your Complete Guide to Practical Success with Bash, Zsh, PowerShell Key Features Embrace Bash, Zsh, and PowerShell across Linux, macOS, Unix Seamlessly progress through chapters with conceptual explanations, illustrative examples, and immersive labs for hands-on skill development Build real-world Linux administration scripts, enhancing your troubleshooting and management skills Book DescriptionEmbark on a comprehensive journey through command shells with this hands-on manual. While Bash is a Linux staple, Z shell and PowerShell are rising stars, applicable to Linux, macOS, and Unix. Progress seamlessly through chapters, each building on the last, creating a solid foundation. Learn through a unique approach: concepts, examples, and interactive labs. These labs, nearly a hundred strong, form the core of experiential learning, essential for script creation. Focusing on Linux commands and their scripting applications, this manual is universally relevant across Linux and select Unix-like systems. It goes beyond theory, offering practical scripts for real-world Linux administration. Scripts are designed for manageability, aiding learning and troubleshooting. The goal is to nurture the ability to craft intelligent, functional shell scripts. While centered on Bash, this book offers a peek into the future with Z Shell and PowerShell, expanding your skills and adaptability. This book is systematically structured and engaging so that it will guide you to master command shells, equipping you for real-world Linux challenges.What you will learn Grasp the concept of shells and explore their diverse types for varied system interactions Master redirection, pipes, and compound commands for efficient shell operations Leverage text stream filters within scripts for dynamic data manipulation Harness functions and build libraries to create modular and reusable shell scripts Explore the basic programming constructs that apply to all programming languages Engineer portable shell scripts, ensuring compatibility across diverse platforms beyond Linux Who this book is for This book is for programmers who use the command line on Unix and Linux servers already, but don't write primarily in Bash. This book is ideal for programmers who've been using a scripting language such as Python, JavaScript or PHP, and would like to understand and use Bash more effectively. It’s also great for beginning programmers, who want to learn programming concepts. |
| bash floating point math: Advanced Bash Scripting Guide 5.3 Volume 1 Mendel Cooper, 2010 |
| bash floating point math: Advanced Bash Scripting Guide Mendel Cooper, 2014 |
| bash floating point math: Mastering Unix Shell Scripting Randal K. Michael, 2011-09-14 UNIX expert Randal K. Michael guides you through every detail of writing shell scripts to automate specific tasks. Each chapter begins with a typical, everyday UNIX challenge, then shows you how to take basic syntax and turn it into a shell scripting solution. Covering Bash, Bourne, and Korn shell scripting, this updated edition provides complete shell scripts plus detailed descriptions of each part. UNIX programmers and system administrators can tailor these to build tools that monitor for specific system events and situations, building solid UNIX shell scripting skills to solve real-world system administration problems. |
| bash floating point math: Linux Command Line and Shell Scripting Bible Richard Blum, Christine Bresnahan, 2020-12-08 Advance your understanding of the Linux command line with this invaluable resource Linux Command Line and Shell Scripting Bible, 4th Edition is the newest installment in the indispensable series known to Linux developers all over the world. Packed with concrete strategies and practical tips, the latest edition includes brand-new content covering: Understanding the Shell Writing Simple Script Utilities Producing Database, Web & Email Scripts Creating Fun Little Shell Scripts Written by accomplished Linux professionals Christine Bresnahan and Richard Blum, Linux Command Line and Shell Scripting Bible, 4th Edition teaches readers the fundamentals and advanced topics necessary for a comprehensive understanding of shell scripting in Linux. The book is filled with real-world examples and usable scripts, helping readers navigate the challenging Linux environment with ease and convenience. The book is perfect for anyone who uses Linux at home or in the office and will quickly find a place on every Linux enthusiast’s bookshelf. |
| bash floating point math: Coding for Penetration Testers Jason Andress, Ryan Linn, 2011-09-23 This title provides an understanding of the scripting languages that are in common use when developing tools for penetration testing, and guides the reader through specific examples for custom tool development and the situations in which such tools might be used. |
| bash floating point math: Shell Scripting Steve Parker, 2011-08-17 A compendium of shell scripting recipes that can immediately be used, adjusted, and applied The shell is the primary way of communicating with the Unix and Linux systems, providing a direct way to program by automating simple-to-intermediate tasks. With this book, Linux expert Steve Parker shares a collection of shell scripting recipes that can be used as is or easily modified for a variety of environments or situations. The book covers shell programming, with a focus on Linux and the Bash shell; it provides credible, real-world relevance, as well as providing the flexible tools to get started immediately. Shares a collection of helpful shell scripting recipes that can immediately be used for various of real-world challenges Features recipes for system tools, shell features, and systems administration Provides a host of plug and play recipes for to immediately apply and easily modify so the wheel doesn't have to be reinvented with each challenge faced Come out of your shell and dive into this collection of tried and tested shell scripting recipes that you can start using right away! |
| bash floating point math: Linux Fundamentals Richard Blum, 2022-11-02 The Linux world is constantly changing, requiring new knowledge and skills to work as a Linux system administrator. Linux Fundamentals, Second Edition not only updates the first edition with new material, but also changes the book’s focus a bit, from a basic approach to Linux to a more advanced server-oriented look at using Linux. While the first edition tracked the skills needed to meet the LPI Linux Fundamentals exam requirements, this edition tracks the more advanced CompTIA Linux+ exam requirements. The Second Edition provides a soft, accessible, and practical introduction to Linux environments and command line basics. The addition of new virtual labs will also empower students to apply theory in hands-on exercises in real time. This edition dives deeper into the Linux server environment, covering the commands you are expected to know for the Linux+ exam. |
| bash floating point math: Korn Shell / Ksh Larry L. Smith, 2006-10-12 This book, for UNIX-LINUX computer users, provides the beginner AND the 'guru' with practical, real-world examples and Korn shell (ksh) scripts that make tough jobs easy.With this book, you can ... - Make your boss happy right NOW!- Learn a new language.- Master an old language.- Write scripts that solve problems.- Provide Quality Assurance.- Be a master troubleshooter.- Analyze logs, verify data.- Make tough jobs easy! |
| bash floating point math: CompTIA Linux+ Study Guide Christine Bresnahan, Richard Blum, 2019-06-24 The bestselling study guide completely updated for the NEW CompTIA Linux+ Exam XK0-004 This is your one-stop resource for complete coverage of Exam XK0-004, covering 100% of all exam objectives. You'll prepare for the exam smarter and faster with Sybex thanks to superior content including, assessment tests that check exam readiness, objective map, real-world scenarios, hands-on exercises, key topic exam essentials, and challenging chapter review questions. Linux is a UNIX-based operating system originally created by Linus Torvalds with the help of developers around the world. Developed under the GNU General Public License, the source code is free. Because of this Linux is viewed by many organizations and companies as an excellent, low-cost, secure alternative to expensive OSs, such as Microsoft Windows. The CompTIA Linux+ exam tests a candidate's understanding and familiarity with the Linux Kernel. As the Linux server market share continues to grow, so too does demand for qualified and certified Linux administrators. Building on the popular Sybex Study Guide approach, this book will provide 100% coverage of the NEW Linux+ Exam XK0-004 objectives. The book contains clear and concise information on all Linux administration topic, and includes practical examples and insights drawn from real-world experience. Hardware and System Configuration Systems Operation and Maintenance Security Linux Troubleshooting and Diagnostics Automation and Scripting You’ll also have access to an online test bank, including a bonus practice exam, electronic flashcards, and a searchable PDF of key terms. |
| bash floating point math: Perl Larry L. Smith, 2006-10-13 This book, for UNIX-LINUX computer users, provides the beginner AND the 'guru' with practical, real-world examples and Perl scripts that make tough jobs easy.With this book, you can ... - Make your boss happy right NOW!- Learn a new language.- Master an old language.- Write scripts that solve problems.- Provide Quality Assurance.- Be a master troubleshooter.- Analyze logs, verify data.- Make tough jobs easy! |
| bash floating point math: LPIC-1 Linux Professional Institute Certification Study Guide Christine Bresnahan, Richard Blum, 2019-10-03 The bestselling study guide for the popular Linux Professional Institute Certification Level 1 (LPIC-1). The updated fifth edition of LPIC-1: Linux Professional Institute Certification Study Guide is a comprehensive, one-volume resource that covers 100% of all exam objectives. Building on the proven Sybex Study Guide approach, this essential resource offers a comprehensive suite of study and learning tools such as assessment tests, hands-on exercises, chapter review questions, and practical, real-world examples. This book, completely updated to reflect the latest 101-500 and 102-500 exams, contains clear, concise, and user-friendly information on all of the Linux administration topics you will encounter on test day. Key exam topics include system architecture, Linux installation and package management, GNU and UNIX commands, user interfaces and desktops, essential system services, network and server security, and many more. Linux Servers currently have a 20% market share which continues to grow. The Linux OS market saw a 75% increase from last year and is the third leading OS, behind Windows and MacOS. There has never been a better time to expand your skills, broaden your knowledge, and earn certification from the Linux Professional Institute. A must-have guide for anyone preparing for the 101-500 and 102-500 exams, this study guide enables you to: Assess your performance on practice exams to determine what areas need extra study Understand and retain vital exam topics such as administrative tasks, network configuration, booting Linux, working with filesystems, writing scripts, and using databases Gain insights and tips from two of the industry’s most highly respected instructors, consultants, and authors Access Sybex interactive tools that include electronic flashcards, an online test bank, customizable practice exams, bonus chapter review questions, and a searchable PDF glossary of key terms LPIC-1: Linux Professional Institute Certification Study Guide is ideal for network and system administrators studying for the LPIC-1 exams, either for the first time or for the purpose of renewing their certifications. |
| bash floating point math: Linux System Administration Tom Adelstein, Bill Lubanovic, 2007-03-27 This guide provides a solid background for Linux desktop users who want to move beyond the basics of Linux, and for experienced system administrators who are looking to gain more advanced skills. |
| bash floating point math: Mastering Linux Administration Alexandru Calcatinge, Julian Balog, 2024-03-22 A one-stop Linux administration guide to developing advanced strategies for managing both on-premises and cloud environments while implementing the latest Linux updates in your data center Key Features Learn how to deploy Linux to the cloud with AWS and Azure Familiarize yourself with Docker and Ansible for automation and Kubernetes for container management Become proficient in everyday Linux administration tasks by mastering the Linux command line and automation techniques Purchase of the print or Kindle book includes a free PDF eBook Book DescriptionHarness the power of Linux in modern data center management, leveraging its unparalleled versatility for efficiently managing your workloads in on-premises and cloud environments. In this second edition, you'll find updates on the latest advancements in Linux administration including containerization, shell scripting, and hypervisors. Written by an experienced Linux trainer, this book will start you off with Linux installation on on-premises systems. As you progress, you’ll master the Linux command line, files, packages, and filesystems. You'll explore essential Linux commands and techniques to secure your Linux environment. New to this edition is a chapter on shell scripting, providing structured guidance on using shell programming for basic Linux automation. This book also delves into the world of containers, with two new chapters dedicated to Docker containers and hypervisors, including KVM virtual machines. Once adept with Linux containers, you'll learn about modern cloud technologies, managing and provisioning container workloads using Kubernetes, and automating system tasks using Ansible. Finally, you'll get to grips with deploying Linux to the cloud using AWS and Azure-specific tools. By the end of this Linux book, you'll have mastered everyday administrative tasks, seamlessly navigating workflows spanning from on-premises to the cloud. What you will learn Discover how to create and use bash scripts to automate tasks Navigate containerized workflows efficiently using Docker and Kubernetes Deploy Linux to the cloud using AWS and Azure Automate your configuration management workloads with Ansible 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 Explore the most widely used commands for managing the Linux filesystem, network, security, and more Who this book is for Whether you’re a new or seasoned Linux administrator seeking to understand modern concepts of Linux system administration, this book is a valuable resource packed with new and updated Linux insights. Windows System Administrators looking to extend their knowledge to the Linux OS will also benefit from this book’s latest edition. No prior knowledge is needed, all you need is a willingness to learn. |
| bash floating point math: Shell Scripting Recipes Chris Johnson, 2006-11-03 *Author is active and well-known within the community *Comprehensive and example-driven, for faster completion of administration tasks *Scripts are POSIX-compliant; supported by all mainstream shells *All examples contain the problem, the solution, and the code needed to implement the solution. |
| bash floating point math: UNIX for OpenVMS Users Philip Bourne, Richard Holstein, Joseph McMullen, 2003-05-29 UNIX for OpenVMS Users, 3E, makes it easy to see what OpenVMS and UNIX have in common, and to transfer your knowledge and experience in OpenVMS over to the world of UNIX. Since most shops rely on more than one operating system, it is critical for system administrators and managers to understand the similarities and differences between platforms, so they can easily work in both environments while taking full advantage of the tools and applications available on each. This book offers OpenVMS professionals a concise source of information, so that they can quickly bring their expertise to bear on UNIX file management, e-mail, networking, and security. This new edition of the book is enhanced with updated references to VMS, incorporates suggestions made by readers of previous editions, and particularly, recognizes other UNIX implementations in addition to HP's Tru64. - Includes extensive additions to the sections on VMS logical names, on the emacs editor, and on shell programming and Perl - Describes the interfaces common to both operating systems, with appendices covering command and editor summaries - Adds emphasis on Linux |
| bash floating point math: Learning the Korn Shell Arnold Robbins, Bill Rosenblatt, 2002-04-23 The first edition of this book covered the 1988 version of the Korn shell. Shortly after it was published, David Korn released the 1993 version, which included compatibility with the POSIX 1003.2 shell standard, as well as many new features. Although ksh93 has been slow to spread to the commercial Unix world, source code is now available, so anyone who wants a copy of the latest and greatest version of ksh93 has but to download the source and compile it. With this in mind, we have made ksh93 the focus of the second edition, with a summary of the differences available in an appendix. This edition covers the most recent ksh93 release available at the time of writing, which includes some significant features not found in earlier versions. The basic structure and flow of the book remains the same, and we have updated kshdb, the Korn Shell Debugger, to work with ksh93. Also included with this edition is a reference card that covers many of the features of ksh93 described in this book. |
| bash floating point math: Apple Training Series Edward R. Marczak, 2010-04-16 This in-depth look at advanced topics in Mac network administration shows system administrators and other IT professionals how to use Mac OS X Server v10.5 within a multiplatform, heterogeneous environment. Following the learning objectives of the Apple Certified System Administrator course, this book is a perfect study aid for the Apple Certified System Administrator exam. |
| bash floating point math: The CAD Connection Quan Nguyen, 2007-06 |
| bash floating point math: Not Even Wrong Peter Woit, 2007-03-09 At what point does theory depart the realm of testable hypothesis and come to resemble something like aesthetic speculation, or even theology? The legendary physicist Wolfgang Pauli had a phrase for such ideas: He would describe them as not even wrong, meaning that they were so incomplete that they could not even be used to make predictions to compare with observations to see whether they were wrong or not. In Peter Woit's view, superstring theory is just such an idea. In Not Even Wrong , he shows that what many physicists call superstring theory is not a theory at all. It makes no predictions, even wrong ones, and this very lack of falsifiability is what has allowed the subject to survive and flourish. Not Even Wrong explains why the mathematical conditions for progress in physics are entirely absent from superstring theory today and shows that judgments about scientific statements, which should be based on the logical consistency of argument and experimental evidence, are instead based on the eminence of those claiming to know the truth. In the face of many books from enthusiasts for string theory, this book presents the other side of the story. |
| bash floating point math: UNIX Shell Programming Lowell Jay Arthur, Ted Burns, 1997 Harness the power of shells . . . for the Internet and beyond Completely revised and updated to include the latest developments in Internet and business applications, UNIX Shell Programming, Fourth Edition provides comprehensive coverage of Bourne, Korn, C, and BASH shells. Using a specially developed three-step process, this invaluable guide takes you through the entire universe of UNIX shell, from simple commands and programming to the world of software developers and system administrators. Using this comprehensive book, you'll be able to choose the shell that's right for you -whatever your needs or background. UNIX Shell Programming, Fourth Edition gives you: * Practical guidance on how to create CGI scripts, object warehouses, and reuse catalogs * Everything on shell extensions for management of distributed environments * A special shell reference appendix containing real-life examples that you can use right now Visit the book's companion Web site at www.wiley.com/compbooks/unixshell |
| bash floating point math: Linux Yourself Sunil K. Singh, 2021-08-31 Numerous people still believe that learning and acquiring expertise in Linux is not easy, that only a professional can understand how a Linux system works. Nowadays, Linux has gained much popularity both at home and at the workplace. Linux Yourself: Concept and Programming aims to help and guide people of all ages by offering a deep insight into the concept of Linux, its usage, programming, administration, and several other connected topics in an easy approach. This book can also be used as a textbook for undergraduate/postgraduate engineering students and others who have a passion to gain expertise in the field of computer science/information technology as a Linux developer or administrator. The word Yourself in the title refers to the fact that the content of this book is designed to give a good foundation to understand the Linux concept and to guide yourself as a good Linux professional in various platforms. There are no prerequisites to understand the contents from this book, and a person with basic knowledge of C programming language will be able to grasp the concept with ease. With this mindset, all the topics are presented in such a way that it should be simple, clear, and straightforward with many examples and figures. Linux is distinguished by its own power and flexibility, along with open-source accessibility and community as compared to other operating systems, such as Windows and macOS. It is the author’s sincere view that readers of all levels will find this book worthwhile and will be able to learn or sharpen their skills. KEY FEATURES Provides a deep conceptual learning and expertise in programming skill for any user about Linux, UNIX, and their features. Elaborates GUI and CUI including Linux commands, various shells, and the vi editor Details file management and file systems to understand Linux system architecture easily Promotes hands-on practices of regular expressions and advanced filters, such as sed and awk through many helpful examples Describes an insight view of shell scripting, process, thread, system calls, signal, inter-process communication, X Window System, and many more aspects to understand the system programming in the Linux environment Gives a detailed description of Linux administration by elaborating LILO, GRUB, RPM-based package, and program installation and compilation that can be very helpful in managing the Linux system in a very efficient way Reports some famous Linux distributions to understand the similarity among all popular available Linux and other features as case studies |
| bash floating point math: Beginning Portable Shell Scripting Peter Seebach, 2008-11-21 Portable shell scripting is the future of modern Linux, OS X, and Unix command–line access. Beginning Portable Shell Scripting: From Novice to Professional teaches shell scripting by using the common core of most shells and expands those principles to all of scripting. You will learn about portable scripting and how to use the same syntax and design principles for all shells. You’ll discover about the interaction between shells and other scripting languages like Ruby and Python, and everything you learn will be shown in context for Linux, OS X, bash, and AppleScript. What you’ll learn This book will prime you on not just shell scripting, but also the modern context of portable shell scripting. You will learn The core Linux/OS X shell constructs from a portability point of view How to write scripts that write other scripts, and how to write macros and debug them How to write and design shell script portably from the ground up How to use programmable utilities and their inherent portability to your advantage, while pinpointing potential traps Pulling everything together, how to engineer scripts that play well with Python and Ruby, and even run on embedded systems Who this book is for This book is for system administrators, programmers, and testers working across Linux, OS X, and the Unix command line. Table of Contents Introduction to Shell Scripting Patterns and Regular Expressions Basic Shell Scripting Core Shell Features Explained Shells Within Shells Invocation and Execution Shell Language Portability Utility Portability Bringing It All Together Shell Script Design Mixing and Matching |
| bash floating point math: Linux Kernel Development Robert Love, 2005 An authoritative, practical guide that helps programmers better understand the Linux kernel and to write and develop kernel code. |
| bash floating point math: Sams Teach Yourself Shell Programming in 24 Hours Sriranga Veeraraghavan, 2002 Learn how to develop powerful and robust shell scripts in order to get the most out of your Unix/Linux system. |
| bash floating point math: CompTIA Linux+ Study Guide Richard Blum, Christine Bresnahan, 2022-07-04 The best-selling, hands-on roadmap to acing the new Linux+ exam In the newly updated Fifth Edition of CompTIA Linux+ Study Guide: Exam XK0-005, IT industry veterans and tech education gurus Richard Blum and Christine Bresnahan deliver a concise and practical blueprint to success on the CompTIA Linux+ exam and in your first role as a Linux network or system administrator. In the book, you’ll find concrete strategies and proven techniques to master Linux system management, security, scripting, containers, automation, and troubleshooting. Every competency tested on the Linux+ exam is discussed here. You’ll also get: Hands-on Linux advice that ensures you’re job-ready on the first day of your new network or sysadmin role Test-taking tips and tactics that decrease exam anxiety and get you ready for the challenging Linux+ exam Complimentary access to the Sybex learning environment, complete with online test bank, bonus practice exams, electronic flashcards, and a searchable glossary Perfect for practicing network and system admins seeking an in-demand and valuable credential for working with Linux servers and computers, CompTIA Linux+ Study Guide: Exam XK0-005, Fifth Edition, will also earn a place in the libraries of people looking to change careers and start down an exciting new path in tech. And save 10% when you purchase your CompTIA exam voucher with our exclusive WILEY10 coupon code. |
| bash floating point math: Learning Linux Shell Scripting Ganesh Sanjiv Naik, 2018-05-21 Break through the practice of writing tedious code with shell scripts Key Features Learn to impeccably build shell scripts and develop advanced applications Create smart solutions by writing and debugging scripts A step-by-step tutorial to automate routine tasks by developing scripts Book Description Linux is the most powerful and universally adopted OS. Shell is a program that gives the user direct interaction with the operating system. Scripts are collections of commands that are stored in a file. The shell reads this file and acts on commands as if they were typed on the keyboard. Learning Linux Shell Scripting covers Bash, GNU Bourne Again Shell, preparing you to work in the exciting world of Linux shell scripting. CentOS is a popular rpm-based stable and secured Linux distribution. Therefore, we have used CentOS distribution instead of Ubuntu distribution. Linux Shell Scripting is independent of Linux distributions, but we have covered both types of distros. We start with an introduction to the Shell environment and basic commands used. Next, we explore process management in Linux OS, real-world essentials such as debugging and perform Shell arithmetic fluently. You'll then take a step ahead and learn new and advanced topics in Shell scripting, such as decision making, starting up a system, and customizing a Linux environment. You will also learn about grep, stream editor, and AWK, which are very powerful text filters and editors. Finally, you'll get to grips with taking backup, using other language scripts in Shell Scripts as well as automating database administration tasks for MySQL and Oracle. By the end of this book, you will be able to confidently use your own shell scripts in the real world. What you will learn Familiarize yourself with the various text filtering tools available in Linux Understand expressions and variables and how to use them practically Automate decision-making and save a lot of time and effort of revisiting code Get to grips with advanced functionality such as using traps, dialogs to develop screens & Database administration such as MySQL or Oracle Start up a system and customize a Linux system Taking backup of local or remote data or important files. Use existing other language scripts such as Python, Perl & Ruby in Shell Scripts Who this book is for Learning Linux Shell Scripting is ideal for those who are proficient at working with Linux and want to learn about shell scripting to improve their efficiency and practical skills. |
| bash floating point math: Linux Shell Scripting Cookbook Shantanu Tushar, 2013-05-21 This book is written in a Cookbook style and it offers learning through recipes with examples and illustrations. Each recipe contains step-by-step instructions about everything necessary to execute a particular task. The book is designed so that you can read it from start to end for beginners, or just open up any chapter and start following the recipes as a reference for advanced users.If you are a beginner or an intermediate user who wants to master the skill of quickly writing scripts to perform various tasks without reading the entire manual, this book is for you. You can start writing scripts and one-liners by simply looking at the similar recipe and its descriptions without any working knowledge of shell scripting or Linux. Intermediate/advanced users as well as system administrators/ developers and programmers can use this book as a reference when they face problems while coding. |
| bash floating point math: C++ High Performance Bjorn Andrist, Viktor Sehr, Ben Garney, 2020-12-30 A comprehensive guide to help aspiring and professional C++ developers elevate the performance of their apps by allowing them to run faster and consume fewer resources. Purchase of the print or Kindle book includes a free eBook in PDF format. Key Features Updated to C++20 with completely revised code and more content on error handling, benchmarking, memory allocators, and concurrent programming Explore the latest C++20 features including concepts, ranges, and coroutines Utilize C++ constructs and techniques to carry out effective data structure optimization and memory management Book Description C++ High Performance, Second Edition guides you through optimizing the performance of your C++ apps. This allows them to run faster and consume fewer resources on the device they're running on without compromising the readability of your codebase. The book begins by introducing the C++ language and some of its modern concepts in brief. Once you are familiar with the fundamentals, you will be ready to measure, identify, and eradicate bottlenecks in your C++ codebase. By following this process, you will gradually improve your style of writing code. The book then explores data structure optimization, memory management, and how it can be used efficiently concerning CPU caches. After laying the foundation, the book trains you to leverage algorithms, ranges, and containers from the standard library to achieve faster execution, write readable code, and use customized iterators. It provides hands-on examples of C++ metaprogramming, coroutines, reflection to reduce boilerplate code, proxy objects to perform optimizations under the hood, concurrent programming, and lock-free data structures. The book concludes with an overview of parallel algorithms. By the end of this book, you will have the ability to use every tool as needed to boost the efficiency of your C++ projects. What you will learn Write specialized data structures for performance-critical code Use modern metaprogramming techniques to reduce runtime calculations Achieve efficient memory management using custom memory allocators Reduce boilerplate code using reflection techniques Reap the benefits of lock-free concurrent programming Gain insights into subtle optimizations used by standard library algorithms Compose algorithms using ranges library Develop the ability to apply metaprogramming aspects such as constexpr, constraints, and concepts Implement lazy generators and asynchronous tasks using C++20 coroutines Who this book is for If you're a C++ developer looking to improve the efficiency of your code or just keen to upgrade your skills to the next level, this book is for you. |
| bash floating point math: The Linux Command Line William E. Shotts, Jr., 2012 You've experienced the shiny, point-and-click surface of your Linux computer—now dive below and explore its depths with the power of the command line. The Linux Command Line takes you from your very first terminal keystrokes to writing full programs in Bash, the most popular Linux shell. Along the way you'll learn the timeless skills handed down by generations of gray-bearded, mouse-shunning gurus: file navigation, environment configuration, command chaining, pattern matching with regular expressions, and more. In addition to that practical knowledge, author William Shotts reveals the philosophy behind these tools and the rich heritage that your desktop Linux machine has inherited from Unix supercomputers of yore. As you make your way through the book's short, easily-digestible chapters, you'll learn how to: * Create and delete files, directories, and symlinks * Administer your system, including networking, package installation, and process management * Use standard input and output, redirection, and pipelines * Edit files with Vi, the world’s most popular text editor * Write shell scripts to automate common or boring tasks * Slice and dice text files with cut, paste, grep, patch, and sed Once you overcome your initial shell shock, you'll find that the command line is a natural and expressive way to communicate with your computer. Just don't be surprised if your mouse starts to gather dust. A featured resource in the Linux Foundation's Evolution of a SysAdmin |
| bash floating point math: Bash Reference Manual Chet Ramey, Brian Fox, 2002 This volume is the official reference manual for GNU Bash, the standard GNU command-line interpreter. |
| bash floating point math: Using Linux Jack Tackett, David Gunter, Lance Brown, 1995 Designed for high-end users who want to squeeze every ounce of power out of their PC, this is a comprehensive tutorial on installing, configuring, and working with this powerful operating system. The CD contains a complete version of the 32-bit Linux operating system, including all the source code and a variety of add-on tools and utilities. |
| bash floating point math: Introducing Elixir Simon St. Laurent, J. David Eisenberg, 2016-12-22 Smooth, powerful, and small, Elixir is an excellent language for learning functional programming, and with this hands-on introduction, you’ll discover just how powerful Elixir can be. Authors Simon St. Laurent and J. David Eisenberg show you how Elixir combines the robust functional programming of Erlang with an approach that looks more like Ruby, and includes powerful macro features for metaprogramming. Updated to cover Elixir 1.4, the second edition of this practical book helps you write simple Elixir programs by teaching one skill at a time. Once you pick up pattern matching, process-oriented programming, and other concepts, you’ll understand why Elixir makes it easier to build concurrent and resilient programs that scale up and down with ease. Get comfortable with IEx, Elixir’s command line interface Learn Elixir’s basic structures by working with numbers Discover atoms, pattern matching, and guards: the foundations of your program structure Delve into the heart of Elixir processing with recursion, strings, lists, and higher-order functions Create Elixir processes and send messages among them Store and manipulate structured data with Erlang Term Storage and the Mnesia database Build resilient applications with the Open Telecom Platform |
| bash floating point math: Wicked Cool Shell Scripts, 2nd Edition Dave Taylor, Brandon Perry, 2016-10-15 Shell scripts are an efficient way to interact with your machine and manage your files and system operations. With just a few lines of code, your computer will do exactly what you want it to do. But you can also use shell scripts for many other essential (and not-so-essential) tasks. This second edition of Wicked Cool Shell Scripts offers a collection of useful, customizable, and fun shell scripts for solving common problems and personalizing your computing environment. Each chapter contains ready-to-use scripts and explanations of how they work, why you’d want to use them, and suggestions for changing and expanding them. You'll find a mix of classic favorites, like a disk backup utility that keeps your files safe when your system crashes, a password manager, a weather tracker, and several games, as well as 23 brand-new scripts, including: – ZIP code lookup tool that reports the city and state – Bitcoin address information retriever – suite of tools for working with cloud services like Dropbox and iCloud – for renaming and applying commands to files in bulk – processing and editing tools Whether you want to save time managing your system or just find new ways to goof off, these scripts are wicked cool! |
| bash floating point math: The AWK Programming Language Alfred V. Aho, Brian W. Kernighan, Peter J. Weinberger, 2023-09-20 Awk was developed in 1977 at Bell Labs, and it's still a remarkably useful tool for solving a wide variety of problems quickly and efficiently. In this update of the classic Awk book, the creators of the language show you what Awk can do and teach you how to use it effectively. Here's what programmers today are saying: I love Awk. Awk is amazing. It is just so damn good. Awk is just right. Awk is awesome. Awk has always been a language that I loved. It's easy: Simple, fast and lightweight. Absolutely efficient to learn because there isn't much to learn. 3-4 hours to learn the language from start to finish. I can teach it to new engineers in less than 2 hours. It's productive: Whenever I need to do a complex analysis of a semi-structured text file in less than a minute, Awk is my tool. Learning Awk was the best bang for buck investment of time in my entire career. Designed to chew through lines of text files with ease, with great defaults that minimize the amount of code you actually have to write to do anything. It's always available: AWK runs everywhere. A reliable Swiss Army knife that is always there when you need it. Many systems lack Perl or Python, but include Awk. Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details. |
| bash floating point math: A Primer on Scientific Programming with Python Hans Petter Langtangen, 2016-07-28 The book serves as a first introduction to computer programming of scientific applications, using the high-level Python language. The exposition is example and problem-oriented, where the applications are taken from mathematics, numerical calculus, statistics, physics, biology and finance. The book teaches Matlab-style and procedural programming as well as object-oriented programming. High school mathematics is a required background and it is advantageous to study classical and numerical one-variable calculus in parallel with reading this book. Besides learning how to program computers, the reader will also learn how to solve mathematical problems, arising in various branches of science and engineering, with the aid of numerical methods and programming. By blending programming, mathematics and scientific applications, the book lays a solid foundation for practicing computational science. From the reviews: Langtangen ... does an excellent job of introducing programming as a set of skills in problem solving. He guides the reader into thinking properly about producing program logic and data structures for modeling real-world problems using objects and functions and embracing the object-oriented paradigm. ... Summing Up: Highly recommended. F. H. Wild III, Choice, Vol. 47 (8), April 2010 Those of us who have learned scientific programming in Python ‘on the streets’ could be a little jealous of students who have the opportunity to take a course out of Langtangen’s Primer.” John D. Cook, The Mathematical Association of America, September 2011 This book goes through Python in particular, and programming in general, via tasks that scientists will likely perform. It contains valuable information for students new to scientific computing and would be the perfect bridge between an introduction to programming and an advanced course on numerical methods or computational science. Alex Small, IEEE, CiSE Vol. 14 (2), March /April 2012 “This fourth edition is a wonderful, inclusive textbook that covers pretty much everything one needs to know to go from zero to fairly sophisticated scientific programming in Python...” Joan Horvath, Computing Reviews, March 2015 |
| bash floating point math: Mastering Bash Giorgio Zarrelli, 2017-06-21 Your one stop guide to making the most out of Bash programming About This Book From roots to leaves, learn how to program in Bash and automate daily tasks, pouring some spice in your scripts Daemonize a script and make a real service of it, ensuring it's available at any time to process user-fed data or commands This book provides functional examples that show you practical applications of commands Who This Book Is For If you're a power user or system administrator involved in writing Bash scripts to automate tasks, then this book is for you. This book is also ideal for advanced users who are engaged in complex daily tasks. What You Will Learn Understand Bash right from the basics and progress to an advanced level Customise your environment and automate system routine tasks Write structured scripts and create a command-line interface for your scripts Understand arrays, menus, and functions Securely execute remote commands using ssh Write Nagios plugins to automate your infrastructure checks Interact with web services, and a Slack notification script Find out how to execute subshells and take advantage of parallelism Explore inter-process communication and write your own daemon In Detail System administration is an everyday effort that involves a lot of tedious tasks, and devious pits. Knowing your environment is the key to unleashing the most powerful solution that will make your life easy as an administrator, and show you the path to new heights. Bash is your Swiss army knife to set up your working or home environment as you want, when you want. This book will enable you to customize your system step by step, making your own real, virtual, home out of it. The journey will take you swiftly through the basis of the shell programming in Bash to more interesting and challenging tasks. You will be introduced to one of the most famous open source monitoring systems—Nagios, and write complex programs with it in any languages. You'll see how to perform checks on your sites and applications. Moving on, you'll discover how to write your own daemons so you can create your services and take advantage of inter-process communication to let your scripts talk to each other. So, despite these being everyday tasks, you'll have a lot of fun on the way. By the end of the book, you will have gained advanced knowledge of Bash that will help you automate routine tasks and manage your systems. Style and approach This book presents step-by-step instructions and expert advice on working with Bash and writing scripts. Starting from the basics, this book serves as a reference manual where you can find handy solutions and advice to make your scripts flexible and powerful. |
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Bash - GNU Project - Free Software Foundation
Sep 22, 2020 · Bash is the GNU Project's shell—the Bourne Again SHell. This is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and the C shell (csh). It is …
How to Install Bash on Windows 11 - How-To Geek
Mar 18, 2022 · Bash, the default shell on most Linux distributions, runs better than ever on Windows 11 thanks to upgrades to the Windows Subsystem for Linux. Here's how you install the Bourne …
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Bash (Unix shell) - Wikipedia
In computing, Bash (short for "Bourne Again SHell") [6] is an interactive command interpreter and command programming language developed for UNIX-like operating systems. [7]
Introduction to Bash and Bash Scripting - GeeksforGeeks
Apr 28, 2025 · In this article we discuss Bash scripting which plays a vital role in automating tasks within the Linux environment. As a command-line interpreter, Bash offers simplicity and ease of …
What Is Bash in Linux? - howtouselinux
Mar 7, 2024 · Bash is a commonly-used shell in many Linux distributions. Bash is a command interpreter. It is a command-line–only interface containing a handful of built-in commands; it has …
Bash: Online Shopping - Shop Clothing, Sports, Home ...
Bash is a fashion and lifestyle shopping platform in South Africa offering over 200 of the world’s best brands and 2000+ new items added weekly.
Bash - GNU Project - Free Software Foundation
Sep 22, 2020 · Bash is the GNU Project's shell—the Bourne Again SHell. This is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and the C shell …
How to Install Bash on Windows 11 - How-To Geek
Mar 18, 2022 · Bash, the default shell on most Linux distributions, runs better than ever on Windows 11 thanks to upgrades to the Windows Subsystem for Linux. Here's how you install …
Clothing, footwear & women's accessories | ba&sh official website
Discover the world of ba&sh: resolutely feminine and unique collections, ahead of the trends. Take advantage of free delivery and easy returns.
Bash (Unix shell) - Wikipedia
In computing, Bash (short for "Bourne Again SHell") [6] is an interactive command interpreter and command programming language developed for UNIX-like operating systems. [7]
Introduction to Bash and Bash Scripting - GeeksforGeeks
Apr 28, 2025 · In this article we discuss Bash scripting which plays a vital role in automating tasks within the Linux environment. As a command-line interpreter, Bash offers simplicity and ease …
What Is Bash in Linux? - howtouselinux
Mar 7, 2024 · Bash is a commonly-used shell in many Linux distributions. Bash is a command interpreter. It is a command-line–only interface containing a handful of built-in commands; it …
