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Your ultimate interface into Nix is entirely @ your discretion. BASH is the default in Linux, however, apt alternatives abound. Explore them. KornShell provides many features worth exploring. Perhaps it will win your loyalty. Either way, the more you know, the more you can do from the $SHELL. Study KornShell in this release.

Release Syllabus

Korn Shell Scripting

LinuxCBT feat. KornSHell Edition - Module VII

  • Introduction - Features
    • Discuss KornShell history
    • Explore system configuration
    • Identify key systems to be used
    • Discuss key features
  •  
  • Shell Basics
    • Create KornShell users on various systems
    • Identify key KornShell binaries and configuration files
    • Explore key KornShell variables
    • Discuss shell redirection and piping
  •  
  • Command Chaining | Substitution
    • Discuss features and applications
    • Explain general usage of 'test' command
    • Evaluate sequential execution of processes
    • Invoke commands contingently using logical AND and OR
    • Implement command substitution
    • Evaluate defined variables using command substitution
  •  
  • Variables
    • Discuss features and applications
    • Discuss and reference positional parameters
    • Explore standard command exit status variable
    • Learn how to define variables
    • Define persistent variables
    • Unset variables and evaluate
  •  
  • The Prompt - $PS{1..4}
    • Discuss various prompt shell variables
    • Setup vi-style command history access
    • Customize primary prompt with useful KornShell variables
    • Define a persistent prompt
    • Evaluate results
  •  
  • Functions
    • Discuss features and benefits
    • Explore POSIX and KornShell functions
    • Define useful functions in a script
    • Reference functions from a script
    • Discuss how positional parameters are supported with funcitons
    • Evaluate results
  •  
  • Loops
    • Discuss features and benefits
    • Identify the supported iteration mechanisms
    • Implement for | while | until loops
    • Create finite and infinite loops
    • Evaluate results
  •  
  • Conditions
    • Discuss features and applications
    • Explore comparison testing
    • Perform numeric comparisons
    • Perform string comparisons
    • Branch out using if | elif | else
    • Evaluate results
  •  
  • Error Handling
    • Discuss features and applications
    • Create script which requires a positional parameter
    • Error handle as necessary
    • Confirm the existence of the file referenced by the positional parameter
    • Compartmentalize error handling into a function
    • Evaluate results
  •  
  • Backup Script
    • Discuss features and benefits
    • Write a script to backup various files and directories
    • Ensure that script is executed with appropriate number of positional parameters
    • Auto-create backup file name using a unique date identifier
    • Tar and compress (using gzip) backup items
    • Incorporate error handling
    • Evaluate results
  •  
  • Arrays
    • Discuss features and applications
    • Explain supported arrays
    • Define indexed array with various items
    • Reference individual and total array elements
    • Evaluate results
    • Build indexed array using command substitution
    • Loop through array elements
    • Define associative array with various items
    • Expose total array elements
  •  
  • Regular Expressions
    • Discuss features and applications
    • Highlight key metacharacters
    • Use character-classes
    • Implement RegExes with shell commands: ls|grep|awk|sed
    • Evaluate results
  •  
  • Kornshell on Solaris
    • Compare & contrast Linux and Solaris Korn implementation
    • Create Kornshell user on Solaris
    • Identify key files
    • Explore Solaris Kornshell as the user
    • Customize Solaris Kornshell environment
    • Run scripts created on Linux
    • Evaluate results
  •  
  • Case
    • Discuss features and benefits
    • Explain usage
    • Create cases based on simple RegExes
    • Write script to identify file types using case
    • Explore case usage in system scripts
    • Evaluate results
  •  
  • Job Control
    • Discuss features and benefits
    • Background and foreground jobs
    • Interact with running jobs
    • Isolate jobs from TTY
    • Evaluate results
  •  
  • Typeset
    • Discuss features and benefits
    • Define variables of disparate types
    • Justfiy variables
    • Transform positional parameters and variables
    • Enumerate system variables
    • Scope variables in and out of functions
    • Evaluate results
  •  
  • Input Validation
    • Discuss features and benefits
    • Ensure the requisite number of positional parameters
    • Confirm input prior to execution
    • Evaluate results
  •  

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