Learning Bash Shell Scripting Gently - Paperback

by Liza Noble (Author), Sujata Biswas (Author)

With the automation menace hovering over us, it is imperative that we equip ourselves with skills that can preserve our jobs for the years to come.Competition will be tough. IT Industry experts express concern that 60% of IT workers may lose their jobs. However, it is not that we don't face challenges now. After a certain age, the ability to absorb new skills gradually diminishes, it wouldn't have mattered say 20 years back. But now, experienced folks are not seen as assets in a company but merely as units for which the company pays a certain amount of money. The prevailing idea is why not get the job done by a fresher/intern from a College. There will be a dip in quality but that's ok. In such a scenario, it becomes important that we bring value to our jobs by learning new technologies and if they don't appreciate it, then, well, we can always search for greener pastures. Shell Scripting in Linux is my response to the threat of automation. Let's confront the fears that haunt us and get on with it. I am sure we can ride this so-called wave of automation with better skills and better quality of life for our familiesContentsLearning Shell Scripting gentlyTarget Audience: Chapter 1: Going Thru Linux FundamentalsWhat is BASH?What are streams?What is Redirection?Explain Permissions?What are Variables?Chapter 2: Local variables versus Environment variablesDouble or Single Quotes?What are Local Variables?What are Variable brace expansions?How to perform Mathematical Calculations on the Shell?Command SubstitutionsChapter 3: Customizing your environmentWhat are Personal Settings?Chapter 4: Shell FeaturesCommand StructureWhat is the Path Variable?Chapter 5: Exit Status with AND and OR operatorsAND operatorChapter 6: Escaping CharactersChapter 7: The Command InterpreterChapter 8: Interact with users using readChapter 9: Introducing If-Then-Else-ELIFWhat are Positional Parameters?What are Special Parameters?Understanding impact of echo in your script.Various structures of if- then-else-elifPrimary Expressions: Using TestInteger Operators used with test [ ]Chapter 10: Looking at LoopingChapter 11: Detour to sedUsing Regular expression in sedUsing square brackets to match a single character: More sed modifiersChapter 12: Working with Case conditionalsArgument IdentifierChapter 13: Loops AgainThe While and Until loops.While loop examplesUntil loop examplesBreak and ContinueContinue loopChapter 14: Introducing FunctionsChapter 15: AWKChapter 16: Shell Commands that you must knowThe printf commandThe alias commandThe cut commandThe grep commandThe tar CommandChapter 17: What are Regular Expressions?