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Korn Shell training

Korn Shell Course Content

Introduction and Overview
  • Role of shell scripting
  • Benefits of KornShell and Bash vs. other shells
  • Differences and similarities between bash, ksh88 and ksh93
  • Integrating scripts with external tools: grep, sed, awk and others
  • Customising the login environment
Bash and KornShell Scripting Fundamentals
Shell script elements
  • Commands and comments
  • Defining exit values
Conditional program execution
  • Applying if and case statements
  • Simplifying if logic with elif
Program loops and iteration
  • Conditional looping with while and until
  • Listing for loops
Testing files and directories
  • Analysing attributes
  • Checking file size and contents
Strings and patterns using (())
  • Comparing strings
  • Verifying the existence of a string
  • Pattern matching and special characters
Debugging
  • Redirecting standard error
  • set commands for debugging
Storing and Accessing Data
Positional parameters
  • Passing and accessing parameters
  • Setting and unsetting parameters
  • Manipulating parameters as groups
Title Comes HereaShell variables
  • Defining environment and local variables
  • Specifying default values and error conditions
Arrays
  • Creating and indexing arrays
  • Processing array contents with special variables
Processing Data
Manipulating strings
  • Extracting substrings
  • Determining string length
  • Find and replace
Mathematics
  • Arithmetic for and while loops
  • Writing mathematical expressions: (( )), $(( )) and let
Modular Programming with Functions
Function basics
  • Functions vs. scripts
  • Parameters and variables
Creating a function library
  • Finding your library with PATH
  • Dot . and source commands
Interacting with the Outside World
Manipulating files and redirecting data
  • Scripting file and directory management
  • Deciphering redirection order
  • Unravelling the secrets of exec: opening and closing multiple files
Interacting with running processes
  • Handling errors
  • Defining post-termination actions such as notification, cleanup
  • Handling and sending signals: trap and kill
Accessing network servers
  • Connecting to a network server
  • Exchanging data with a network server
Creating Production Quality Scripts
Ensuring environmental control
  • Checking and modifying environment variables
  • Using getopts to process command line options
Handling user interactions
  • Setting up error processing
  • Employing select to create a menu interface
  • Processing keyboard input