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BL
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| Record Number
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592426
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| Doc. No
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b421645
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| Main Entry
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Tushar, Shantanu
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| Title & Author
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Linux Shell Scripting Cookbook
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| Edition Statement
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2nd ed
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2nd ed
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| Page. NO
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1 online resource (384 pages)
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| ISBN
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9781782162759
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: 1782162755
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9781782162742
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| Notes
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Image crawler and downloader
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| Contents
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Cover; Copyright; Credits; About the Authors; About the Reviewers; www.PacktPub.com; Table of Contents; Preface; Chapter 1: Shell Something Out; Introduction; Printing in the terminal; Playing with variables and environment variables; Function to prepend to environment variables; Math with the shell; Playing with file descriptors and redirection; Arrays and associative arrays; Visiting aliases; Grabbing information about the terminal; Getting and setting dates and delays; Debugging the script; Functions and arguments; Reading the output of a sequence of commands
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Reading n characters without pressing the return keyRunning a command until it succeeds; Field separators and iterators; Comparisons and tests; Chapter 2: Have a Good Command; Introduction; Concatenating with cat; Recording and playing back of terminal sessions; Finding files and file listing; Playing with xargs; Translating with tr; Checksum and verification; Cryptographic tools and hashes; Sorting unique and duplicates; Temporary file naming and random numbers; Splitting files and data; Slicing filenames based on extension; Renaming and moving files in bulk
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Spell checking and dictionary manipulationAutomating interactive input; Making commands quicker by running parallel processes; Chapter 3: File In, File Out; Introduction; Generating files of any size; The intersection and set difference (A-B) on text files; Finding and deleting duplicate files; Working with file permissions, ownership, and the sticky bit; Making files immutable; Generating blank files in bulk; Finding symbolic links and their targets; Enumerating file type statistics; Using loopback files; Creating ISO files and hybrid ISO; Finding the difference between files, patching
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Using head and tail for printing the last or first 10 linesListing only directories -- alternative methods; Fast command-line navigation using pushd and popd; Counting the number of lines, words, and characters in a file; Printing the directory tree; Chapter 4: Texting and Driving; Introduction; Using regular expressions; Searching and mining a text inside a file with grep; Cutting a file column-wise with cut; Using sed to perform text replacement; Using awk for advanced text processing; Finding the frequency of words used in a given file; Compressing or decompressing JavaScript
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Merging multiple files as columnsPrinting the nth word or column in a file or line; Printing text between line numbers or patterns; Printing lines in the reverse order; Parsing e-mail addresses and URLs from a text; Removing a sentence in a file containing a word; Replacing a pattern with text in all the files in a directory; Text slicing and parameter operations; Chapter 5: Tangled Web? Not At All!; Introduction; Downloading from a web page; Downloading a web page as plain text; A primer on cURL; Accessing Gmail e-mails from the command line; Parsing data from a website
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| Abstract
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This book is written in a Cookbook style and it offers learning through recipes with examples and illustrations. Each recipe contains step-by-step instructions about everything necessary to execute a particular task. The book is designed so that you can read it from start to end for beginners, or just open up any chapter and start following the recipes as a reference for advanced users. If you are a beginner or an intermediate user who wants to master the skill of quickly writing scripts to perform various tasks without reading the entire manual, this book is for you. You can start writing scri
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| Subject
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Scripting languages (Computer science)
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| LC Classification
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QA76.3 .T384 2013
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