Linux Shell Scripting Cookbook - Third Edition by Shantanu Tushar

Key FeaturesBecome an expert in creating powerful shell scripts and explore the full possibilities of the shellAutomate any administrative task you could imagine, with shell scriptsPacked with easy-to-follow recipes on new features on Linux, particularly, Debian-based, to help you accomplish even the most complex tasks with easeBook DescriptionThe shell is the most powerful tool your computer provides. Despite having it at their fingertips, many users are unaware of how much the shell can accomplish.Using the shell, you can generate databases and web pages from sets of files, automate monotonous admin tasks such as system backups, monitor your systems health and activity, identify network bottlenecks and system resource hogs, and more.This book will show you how to do all this and much more.This book, now in its third edition, describes the exciting new features in the newest Linux distributions to help you accomplish more than you imagine. It shows how to use simple commands to automate complex tasks, automate web interactions, download videos, set up containers and cloud servers, and even get free SSL certificates.Starting with the basics of the shell, you will learn simple commands and how to apply them to real-world issues. From there, youll learn text processing, web interactions, network and system monitoring, and system tuning.Software engineers will learn how to examine system applications, how to use modern software management tools such as git and fossil for their own work, and how to submit patches to open-source projects.Finally, youll learn how to set up Linux Containers and Virtual machines and even run your own Cloud server with a free SSL Certificate from letsencrypt.org.What you will learnInteract with websites via scriptsWrite shell scripts to mine and process data from the WebAutomate system backups and other repetitive tasks with crontabCreate, compress, and encrypt archives of your critical data.Configure and monitor Ethernet and wireless networksMonitor and log network and system activityTune your system for optimal performanceImprove your systems securityIdentify resource hogs and network bottlenecksExtract audio from video filesCreate web photo albumsUse git or fossil to manage revision control and interact with FOSS projectsCreate and maintain Linux containers and Virtual MachinesRun a private Cloud serverAbout the AuthorClif Flynt has been programming computers since 1970, administering Linux/Unix systems since 1985, and writing since he was 9 years old.Hes active in the Tcl/Tk and Linux user communities. He speaks frequently at technical conferences and user groups.He owns and runs Noumena Corporation, where he develops custom software and delivers training sessions. His applications have been used by organizations ranging from one man startups to the US Navy. These applications range from distributed simulation systems to tools to help fiction authors write better (Editomat). He has trained programmers on four continents.When not working with computers, Clif plays guitar, writes fiction experiments with new technologies, and plays with his wifes cats.Hes the author of Tcl/Tk: A Developers Guide by Morgan Kauffman, 2012, as well as several papers, and magazine articles. His poetry and fiction have been published in small journals, including Write to Meow by Grey Wolfe Press, 2015.Sarath Lakshman is a 27 year old who was bitten by the Linux bug during his teenage years. He is a software engineer working in ZCloud engineering group at Zynga, India. He is a life hacker who loves to explore innovations. He is a GNU/Linux enthusiast and hactivist of free and open source software. He spends most of his time hacking with computers and having fun with his great friends. Sarath is well known as the developer of SLYNUX (2005) - a user friendly GNU/Linux distribution for Linux newbies. The free and open source software projects he has contributed to are PiTiVi Video editor, SLYNUX GNU/Linux distro, Swathantra Malayalam Computing, School-Admin, Istanbul, and the Pardus Project. He has authored many articles for the Linux For You magazine on various domains of FOSS technologies. He had made a contribution to several different open source projects during his multiple Google Summer of Code projects. Currently, he is exploring his passion about scalable distributed systems in his spare time. Sarath can be reached via his website.Shantanu Tushar is an advanced GNU/Linux user since his college days. He works as an application developer and contributes to the software in the KDE projects. Shantanu has been fascinated by computers since he was a child, and spent most of his high school time writing C code to perform daily activities. Since he started using GNU/Linux, he has been using shell scripts to make the computer do all the hard work for him. He also takes time to visit students at various colleges to introduce them to the power of Free Software, including its various tools. Shantanu is a well-known contributor in the KDE community and works on Calligra, Gluon and the Plasma subprojects. He looks after maintaining Calligra Active - KDEs offie document viewer for tablets, Plasma Media Center, and the Gluon Player. One day, he believes, programming will be so easy that everybody will love to write programs for their computers. Shantanu can be reached by e-mail on shantanu@kde.org, shantanutushar on Identi.ca/Twitter, or his website.Table of ContentsSHELL SOMETHING OUTHAVE A GOOD COMMANDFILE IN, FILE OUT TEXTING AND DRIVINGTANGLED WEB? NOT AT ALL! REPOSITORY MANAGEMENTTHE BACKUP PLAN THE OLD-BOY NETWORK PUT ON THE MONITORS CAPSYSADMIN PLAYGROUNDTRACING PERFORMANCE TUNINGSHELL USAGE IN REAL WORLD SCENARIOS