Ganesh Sanjiv Naik – författare

Unleash the power of shell scripts to solve real-world problems by breaking through the practice of writing tedious codeAbout This Book• Learn how to efficiently and effectively build shell scripts and develop advanced applications with this handy book• Develop high quality and efficient solutions by writing professional and real-world scripts, and debug scripts by checking and shell tracing• A step-by-step tutorial to automate routine tasks by developing scripts from a basic level to very advanced functionalityWho This Book Is ForThis book is ideal for those who are proficient at working with Linux and who want to learn about shell scripting to improve their efficiency and practical skills. 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• Combine the fundamental text and file processing commands to process data and automate repetitive tasks• 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 and signals and using dialogs to develop screens• Start up a system and customize a Linux system• Take an in-depth look at regular expressions and pattern matching to understand the capabilities of scriptingIn DetailLinux is the one of the most powerful and universally adopted OSes. 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 can read this file and act on the commands as if they were typed on the keyboard. Shell scripting is used to automate day-to-day administration, and for testing or product development tasks.This book covers Bash, GNU Bourne Again SHell, preparing you to work in the exciting world of Linux shell scripting. We start with an introduction to the Shell environment and explain basic commands used in Shell. Next we move on to check, kill, and control the execution of processes in Linux OS. Further, we teach you about the filter tools available in Linux and explain standard output and standard errors devices.Then we will ensure you understand Shell''s interpretation of commands and get a firmer grasp so you use them in practice. Next, you''ll experience some real-world essentials such as debugging and perform Shell arithmetic fluently. Then you''ll take a step ahead and learn new and advanced topics in Shell scripting, such as starting up a system and customizing a Linux system. Finally, you''ll get to understand the capabilities of scripting and learn about Grep, Stream Editor, and Awk.Style and approach This practical book will go from the very basics of shell scripting to complex, customized automation. The idea behind this book is to be as practical as possible and give you the look and feel of what real-world scripting is like.

Create simple to advanced shell scripts and enhance your system functionality with effective recipesKey FeaturesAutomate tedious and repetitive tasksCreate several novel applications ranging from a simple IRC logger to a Web ScraperManage your system efficiently by becoming a seasoned Bash userBook DescriptionIn Linux, one of the most commonly used and most powerful tools is the Bash shell. With its collection of engaging recipes, Bash Cookbook takes you through a series of exercises designed to teach you how to effectively use the Bash shell in order to create and execute your own scripts. The book starts by introducing you to the basics of using the Bash shell, also teaching you the fundamentals of generating any input from a command. With the help of a number of exercises, you will get to grips with the automation of daily tasks for sysadmins and power users. Once you have a hands-on understanding of the subject, you will move on to exploring more advanced projects that can solve real-world problems comprehensively on a Linux system. In addition to this, you will discover projects such as creating an application with a menu, beginning scripts on startup, parsing and displaying human-readable information, and executing remote commands with authentication using self-generated Secure Shell (SSH) keys.By the end of this book, you will have gained significant experience of solving real-world problems, from automating routine tasks to managing your systems and creating your own scripts.What you will learnUnderstand the basics of Bash shell scripting on a Linux systemGain working knowledge of how redirections and pipes interactRetrieve and parse input or output of any commandAutomate tasks such as data collection and creating and applying a patchCreate a script that acts like a program with different featuresCustomize your Bash shell and discover neat tricks to extend your programsCompile and install shell and log commands on your system s console using SyslogWho this book is forThe Bash Cookbook is for you if you are a power user or system administrator involved in writing Bash scripts in order to automate tasks. This book is also ideal if you are interested in learning how to automate complex daily tasks.

Break through the practice of writing tedious code with shell scripts

About This Book

Learn to impeccably build shell scripts and develop advanced applicationsCreate smart solutions by writing and debugging scriptsA step-by-step tutorial to automate routine tasks by developing 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.

What You Will Learn

Familiarize yourself with the various text filtering tools available in LinuxUnderstand expressions and variables and how to use them practicallyAutomate decision-making and save a lot of time and effort of revisiting codeGet to grips with advanced functionality such as using traps, dialogs to develop screens & Database administration such as MySQL or OracleStart up a system and customize a Linux systemTaking backup of local or remote data or important files.Use existing other language scripts such as Python, Perl & Ruby in Shell Scripts

In Detail

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.

Style and approach

This practical book will go from the very basics of shell scripting to complex, customized automation. The idea behind this book is to be as practical as possible and give you the look and feel of what real-world scripting is like.

Leverage the features and libraries of Python to administrate your environment efficiently.Key FeaturesLearn how to solve problems of system administrators and automate routine activitiesLearn to handle regular expressions, network administrationBuilding GUI, web-scraping and database administration including data analyticsBook DescriptionPython has evolved over time and extended its features in relation to every possible IT operation. Python is simple to learn, yet has powerful libraries that can be used to build powerful Python scripts for solving real-world problems and automating administrators' routine activities. The objective of this book is to walk through a series of projects that will teach readers Python scripting with each project.This book will initially cover Python installation and quickly revise basic to advanced programming fundamentals. The book will then focus on the development process as a whole, from setup to planning to building different tools. It will include IT administrators' routine activities (text processing, regular expressions, file archiving, and encryption), network administration (socket programming, email handling, the remote controlling of devices using telnet/ssh, and protocols such as SNMP/DHCP), building graphical user interface, working with websites (Apache log file processing, SOAP and REST APIs communication, and web scraping), and database administration (MySQL and similar database data administration, data analytics, and reporting).By the end of this book, you will be able to use the latest features of Python and be able to build powerful tools that will solve challenging, real-world tasksWhat you will learnUnderstand how to install Python and debug Python scriptsUnderstand and write scripts for automating testing and routine administrative activitiesUnderstand how to write scripts for text processing, encryption, decryption, and archivingHandle files, such as pdf, excel, csv, and txt files, and generate reportsWrite scripts for remote network administration, including handling emailsBuild interactive tools using a graphical user interfaceHandle Apache log files, SOAP and REST APIs communicationAutomate database administration and perform statistical analysisWho this book is forThis book would be ideal for users with some basic understanding of Python programming and who are interested in scaling their programming skills to command line scripting and system administration. Prior knowledge of Python would be necessary.