Mastering Linux Shell Scripting has been written for Linux administrators who want to automate tasks in their daily lives, saving time and effort. You'll need to have command-line experience and be familiar with the tasks that you need to automate.What You Will LearnUse the type command to identify the order of command evaluationCreate interactive scripts that prompt for user inputFoster menu structures for operators with little command-line experienceDevelop scripts that dynamically edit web configuration files to produce a new virtual hostWrite scripts that use AWK to search and reports on log filesDraft effective scripts using functions as building blocks, reducing maintenance and build timeMake informed choices by comparing different script languages such as Perl and Python with BASHIn Detail
Shell scripting is a quick method to prototype a complex application or a problem by automating tasks when working on Linux-based systems. Using both simple one-line commands and command sequences complex problems can be solved with ease, from text processing to backing up sysadmin tools.
In this book, you'll discover everything you need to know to master shell scripting and make informed choices about the elements you employ. Get to grips with the fundamentals of creating and running a script in normal mode, and in debug mode. Learn about various conditional statements' code snippets, and realize the power of repetition and loops in your shell script. Implement functions and edit files using the Stream Editor, script in Perl, program in Python – as well as complete coverage of other scripting languages to ensure you can choose the best tool for your project.Style and approach
The book will capture your attention and keep you engaged with the simplicity and clarity of each explanation. Every step is accompanied with screen captures so you can cross-check the results before moving on.
If you are already working as a network penetration tester and want to expand your knowledge of web application hacking, then this book tailored for you. Those who are interested in learning more about the Kali Sana tools that are used to test web applications will find this book a thoroughly useful and interesting guide.What You Will LearnSet up your lab with Kali Linux 2.0Identify the difference between hacking a web application and network hackingUnderstand the different techniques used to identify the flavor of web applicationsExpose vulnerabilities present in web servers and their applications using server-side attacksUse SQL and cross-site scripting (XSS) attacksCheck for XSS flaws using the burp suite proxyFind out about the mitigation techniques used to negate the effects of the Injection and Blind SQL attacksIn Detail
Kali Linux 2.0 is the new generation of the industry-leading BackTrack Linux penetration testing and security auditing Linux distribution. It contains several hundred tools aimed at various information security tasks such as penetration testing, forensics, and reverse engineering.
At the beginning of the book, you will be introduced to the concepts of hacking and penetration testing and will get to know about the tools used in Kali Linux 2.0 that relate to web application hacking. Then, you will gain a deep understanding of SQL and command injection flaws and ways to exploit the flaws. Moving on, you will get to know more about scripting and input validation flaws, AJAX, and the security issues related to AJAX.
At the end of the book, you will use an automated technique called fuzzing to be able to identify flaws in a web application. Finally, you will understand the web application vulnerabilities and the ways in which they can be exploited using the tools in Kali Linux 2.0.Style and approach
This step-by-step guide covers each topic with detailed practical examples. Every concept is explained with the help of illustrations using the tools available in Kali Linux 2.0.
You’ll quickly find answers to the annoying questions that generally come up when you’re writing shell scripts: What characters do you need to quote? How do you get variable substitution to do exactly what you want? How do you use arrays? Updated for Bash version 4.4, this book has the answers to these and other problems in a format that makes browsing quick and easy.
Topics include:Invoking the shellSyntaxFunctions and variablesArithmetic expressionsCommand historyProgrammable completionJob controlShell optionsCommand executionCoprocessesRestricted shellsBuilt-in commands
This book is designed as a server reference for Fedora Linux with systemd. This second edition covers Fedora Linux 23. Administration tools are covered as well as the underlying configuration files and system implementations. The emphasis is on what administrators will need to know to perform key networking and server tasks. Topics covered include the systemd service manager, the systemd service and target files for each server, server roles, and the firewalld firewall. Key servers are examined, including Web, FTP, CUPS printing, NFS, and Samba (Windows shares). Network support servers and applications covered include the Squid proxy server, the Domain Name System server, and DHCP.