UNIX/Linux Shell Scripting

Course Summary

Review of Basics - optional Objectives, Files, Directories and Processes, Displaying Directories - ls, Getting Help - man, Displaying Files - cat, more, Simple Commands, Piping - using | symbol, Redirection - using > symbol, Redirection - using >> symbol, Redirecting Input - using < symbol, Redirecting Errors, Using /dev/null, Foreground Jobs, Background Jobs - &, Stopping Jobs - kill, Special Files - . and .., The Command Prompt - PS1, Creating Aliases, Using Aliases, Command history, Command Line Edit - using Arrow Keys, Command Line Edit - using vi, Customising the Shell, The Home Directory - HOME, The Working Directory - pwd, Changing Directories - cd, Make Directory - mkdir, Remove Directory - rmdir, Interactive Copy - cp -i, Interactive Move - mv -i, Interactive Remove - rm -i, Removing Directories - rm -r, Wild Cards - File Name Generation, Word count - wc, Finding Files - find, Finding Text in Files - grep, sort, cut, uniq, tr, Changing Permissions - chmod Shell Programming Objectives, Creating Shell Scripts, Testing the Command, Creating the Script File, Adding Execute Permissions, Testing the Script, Running the Script - time, Running the Script - dot, Running the Script - exec, Running the Script - ksh, Debugging the Script, Passing Parameters, The read Command, Using read in Scripts, Choosing the Shell, Tidying The Output, Suppressing Input - stty Special Characters and Variables Objectives, Quotation Marks, Quoted Strings - ", ', Quoted Strings - ', Escape Character - *, Quoted Strings - `, Using $(...), System Variables - set, Other Special Variables, User Variables, User Variables - unset, Variables in Scripts, Typeset Command, Integer Variables, Special Constructs Creating Menus Objectives, Conditions - case, Creating a Menu, Iteration - while, until, Holding the Output - sleep, Holding the Output - dummy read, Ending the Script, Ending the Loop, Hidden Option - forking a shell, Trapping Interrupts - trap, More on Interrupts, Highlighting Text - tput, Positioning the Cursor - backtab \b, Korn Shell Menu Selection Objectives, Conditional Testing, Testing File Attributes, Testing File Permissions, Multiple Tests - Nested ifs, Multiple Tests - elsif, The NOT Condition, Multiple Conditions in One Test, Testing Strings, Using Square Brackets, Avoiding Null Input, Testing Numbers, More on case, Displaying Variables, Placing Spaces, Testing Commands Iteration, Looping Objectives, Computations - let, Iteration - while, until, Infinite Loop, Iteration - for, More than 9 Parameters - shift Sub-scripts and Functions Objectives, Local and Global Variables, Sub-scripts, Export Command, Exit Status, Aliases, Functions, Useful Functions, Return Status, Manipulating Functions, Functions in Scripts Advanced Commands Objectives, Debugging - set, Setting - set, Merging Files - join, Merging Files - paste, basename and dirname, Job Control - jobs, Regular Expressions, Global Regular Expression Printer - grep, Expression grep - egrep, Fast grep - fgrep, Computations - expr, Computations – bc, eval Command, Argument Processing, getopts Command, Using Arrays Advanced Edit – vi & sed Objectives, vi - Mapping Key Combinations, Mapping Control Keys, Using Abbreviations, Editing Many Files, Regular Expressions, Global Insert, Here document, Batch Stream Editor - sed, sed delete, -d, sed print, -p, sed suppress, -n, sed quit, -q, sed file, -f, sed Multiple Input, sed, Find and Replace, sed Example Text File Processing - awk Objectives, The awk Programming Tool, Pattern Matching, Regular Expressions, Comparison Patterns, Compound Patterns, Range Patterns, Special Patterns, Built-in Functions, Troubleshooting awk Scripts, Passing Parameters, Using Contains, printf Function, Computations, Functions, substr, length, Action Statements, Control Flow Statements, Arrays, Arrays with for Loops, awk Examples