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Learning linux Shell scripting: Leverage the power of shell scripts to solve real-world problems Second Editionn.

2018年

作者： Ganesh Naik

ISBN: (数字)9781788991537

ISBN: (纸本)9781788993197

Break through the practice of writing tedious code with shell scripts About This Book • 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 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 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 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

关键词： Shell scripting linux Shell scripting Ubuntu 17.10 linux scripting linux sub-system.

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Controlling user access with scripting to mitigate cyber-attacks

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SCIENTIFIC AFRICAN 2024年 26卷

作者： Nyarko-Boateng, Owusu Nti, Isaac Kofi Mensah, Anastasia Akyamaa Gyamfi, Emmanuel Kojo Univ Cincinnati Cincinnati OH 45221 USA Univ Energy & Nat Resources Sunyani Ghana

With the growing threats in the dynamic digital landscape, organizations are grappling with the difficult task of managing cyber-attacks by restricting user accessibility to most communication systems. This study aimed to develop a linux script as a proactive response to the growing of cyber-attacks in organizational settings to prevent attacking vectors based on user negligence. The primary objective was to devise inventive solutions through script automation to restrict user access to the organizational network within predefined time frames, thereby mitigating potential cyber threats. The criteria used to define predefined time frames for user access, include the restriction of users on off duty times, The scripting seeks to address cyber-attacks targeted such as cross-site scripting (XSS) and SQL injection. To achieve the goal of this paper, the necessary steps and logic required to develop the scripts were taken. For instance, there are several suitable languages such as Bash, Python, or Perl, that can be used to write script. The paper selected Bash because it excels at scripting existing command-line tools and utilities, making it a great choice for automating tasks by using Vim text editor tool. The final scripts were run, some errors were identified, and modified as needed to ensure it worked correctly. This phase was necessary to improve the script's performance, readability, and maintainability by refining code, using efficient algorithms, by incorporating best practices. Finally, the various user inputs and scenarios were deployed to put the script into production for user access management. The adopted script metrics deployed such as Script Execution Time, Resources Utilization, Success Rate and Error Rate helped in evaluating the performance, efficiency, and effectiveness of the scripts. The implementation of the script achieved an executive time of 0.032 s, success rate was 1 and error rate was 0. The practical implementation in organizations can be sc

关键词： Cybersecurity automation linux scripting User access control Cyber threat mitigation and attack surface reduction

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Bash Cookbook 1

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丛书名： []

2018年

作者： Ron Brash Ganesh Naik

ISBN: (数字)9781788839174

ISBN: (纸本)9781788629362

Create simple to advanced shell scripts and enhance your system functionality with effective recipes Key Features Automate tedious and repetitive tasks Create several novel applications ranging from a simple IRC logger to a Web Scraper Manage your system efficiently by becoming a seasoned Bash user Book Description In 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 learn Understand the basics of Bash shell scripting on a linux system Gain working knowledge of how redirections and pipes interact Retrieve and parse input or output of any command Automate tasks such as data collection and creating and applying a patch Create a script that acts like a program with different features Customize your Bash shell and discover neat tricks to extend your programs Compile and install shell and log commands on your system's console using S

关键词： Bash Bash programming shell scripting shell variables Operators Menu arrays and functions Iterations cronjob SSH linux linux scripting Grep awk Automation system programming subshell linux Administration daemon command line CLI DevOps

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