Shell scripting recipes : a problem-solution approach /: a problem-solution approach. ([2015])

• Record Type: Book
• Further Information: Note: Chris F.A. Johnson, Jayant Varma.
• Authors: Johnson, Chris F. A; Varma, Jayant
• Contents: At a Glance; Contents; About the Authors; Acknowledgments; Chapter 1: The POSIX Shell and Command-Line Utilities; Shell Commands; echo ; printf ; set ; shift ; type ; getopts ; case ; eval ; local ; Parameters and Variables; Positional Parameters ; Special Parameters ; Shell Variables; standard-vars-A Collection of Useful Variables; Patterns; Pathname Expansion ; Regular Expressions ; Parameter Expansion; The Bourne Shell Expansions ; {var:-DEFAULT}; {var:=DEFAULT}; {var:+VALUE}; {var:?MESSAGE}; POSIX Parameter Expansions. {#var}-Length of Variable's Contents{var%PATTERN}-Remove the Shortest Match from the End; {var%%PATTERN}-Remove the Longest Match from the End; {var#PATTERN}-Remove the Shortest Match from the Beginning; {var##PATTERN}-Remove the Longest Match from the Beginning; Combining Expansions; Shell-Specific Expansions, bash2, and ksh93 ; {var//PATTERN/STRING}-Replace All Instances of PATTERN with STRING; {var:OFFSET:LENGTH}-Return a Substring of var; Shell Arithmetic ; Aliases ; Sourcing a File ; Functions; Functions Are Fast ; Command Substitution Is Slow. Using the Functions in This Book standard-funcs: A Collection of Useful Commands; 1.1 get_key-Get a Single Keystroke from the User ; How It Works; Usage; The Script; Notes; 1.2 getline-Prompt User to Enter a Line ; How It Works; Usage; The Script; 1.3 press_any_key-Prompt for a Single Keypress ; How It Works; Usage; The Script; 1.4 menu1-Print a Menu and Execute a Selected Command ; How It Works; Usage; The Script; 1.5 arg-Prompt for Required Argument If None Supplied ; How It Works; Usage; The Script; 1.6 die-Print Error Message and Exit with Error Status ; How It Works; Usage. The Script 1.7 show_date-Display Date in D[D] MMM YYYY Format ; How It Works; Usage; The Script; 1.8 date_vars-Set Date and Time Variables ; How It Works; Usage; The Script; 1.9 is_num-Is This a Positive Integer? ; How It Works; Usage; The Script; Notes; 1.10 abbrev_num-Abbreviate Large Numbers ; How It Works; Usage; The Script; Notes; 1.11 commas-Add Thousands Separators to a Number ; How It Works; Usage; The Script; 1.12 pr1-Print Arguments, One to a Line ; How It Works; Usage; The Script; 1.13 checkdirs-Check for Directories; Create If Necessary ; How It Works; Usage; The Script. 1.14 checkfiles -Check That a Directory Contains Certain FilesHow It Works; Usage; The Script; 1.15 zpad-Pad a Number with Leading Zeroes ; How It Works; Usage; The Script; 1.16 cleanup-Remove Temporary Files and Reset Terminal on Exit ; How It Works; Usage; The Script; The Unix Utilities; cat: Concatenate Files to the Standard Output ; sed: A Text Stream Editor ; awk: Pattern Scanning and Processing Language ; grep: Print Lines Matching a Regular Expression ; date: Show or Set the System Date ; tr: A Character Translation Utility ; wc: Count Characters, Words, and Lines in a File.
• Edition: Second edition
• Publisher Details: Berkeley, CA : Apress
• Publication Date: 2015
• Copyright Date: 2015
• Extent: 1 online resource (1 volume), illustrations
• Subjects: 004; Computer science; Operating systems (Computers); POSIX (Computer software standard); COMPUTERS -- Computer Literacy; COMPUTERS -- Computer Science; COMPUTERS -- Data Processing; COMPUTERS -- Hardware -- General; COMPUTERS -- Information Technology; COMPUTERS -- Machine Theory; COMPUTERS -- Reference; Operating systems (Computers); POSIX (Computer software standard); Computers -- Software Development & Engineering -- General; Software Engineering; Open source software; Computer programming; Software engineering; Computers -- Programming -- Open Source; Computer programming / software development; Electronic books
• Languages: English
• ISBNs: 9781484202203; 1484202201
• Related ISBNs: 9781484202210; 148420221X
• Notes: Note: Online resource; title from PDF title page (EBSCO, viewed January 22, 2016).
• Access Rights: Legal Deposit; Only available on premises controlled by the deposit library and to one user at any one time; The Legal Deposit Libraries (Non-Print Works) Regulations (UK).
• Access Usage: Restricted: Printing from this resource is governed by The Legal Deposit Libraries (Non-Print Works) Regulations (UK) and UK copyright law currently in force.