Korn Shell Tutorials

Zipped file containing all the scripts: Lessons.zip
(last updated 11/25/2009)

• Tutorial 1 Covers:
• Finding out where the korn shell (ksh) interpreter is.
• Printing to the terminal screen with the "print" statement
• Inserting comments with the #
• example1.ksh: Korn shell script for this lesson.


• Tutorial 2a Covers:
• Defining a variable: VarName="Value"
• Accessing the value of a variable with $VarName
• Lesson2a.ksh: Korn shell script for this lesson.


• Tutorial 2b Covers:
• How to prompt the user for input: print -n
• Assiging input from the keyboard to a variable: read VarName
• ReadingInput.ksh: Korn shell script for this lesson.


• Tutorial 3 Covers:
• Good scripting practices:
• Writing out generally the flow of the script before hand.
• Writing small chunks of code at one time.
• Putting comments into your scripts.
• Turning on debugging for whole script with: #!/bin/ksh -x
• Turning on/off debugging in parts of the script with set -x and set +x.
• Debugging1.ksh: 1 of 2 Korn shell scripts for this lesson.
• Debugging2.ksh: 2 of 2 Korn shell scripts for this lesson.


• Tutorial 4 Covers:
• Arrays - Lists of things.
• Create an array by creating an element in an array.
  For example: ArrayName[PositionFromTop]=Value
  For example: ColorsOfRainbow[0]="Red"
• Arrays.ksh:Korn shell script for this lesson.


• Tutorial 5 Covers:
• Basic Math
• Adddition, Subtraction, Multiplication, Division, & Remainder
• Moving through an array.
• BasicMath.ksh:Korn shell script for this lesson.


• Tutorial 6A Covers:
• Basic "if" statement
    if (( math test ))
    then
      commands
      more commands
    fi
  
• IfMath1.ksh:Korn shell script for this lesson.


• Tutorial 6B Covers:
• Compound if statements with && and ||
  if (( (math test 1) && (math test 2) ))
  then
    commands
    more commands
  fi

• IfMath2.ksh:Korn shell script for this lesson.


• Tutorial 6C Covers:
• Introduces the "else" statement into an if/then/fi block.
  If test is true, then do block of code a, else do block of code b.
  if ( test ); then
    code a
  else
    code b
  fi

• IfMath3.ksh:Korn shell script for this lesson.


• Tutorial 6D Covers:
• Introduces the "elif" statement into an if/then/else/fi block.
  This video demontrates the use of elif, the ability to make
  a 2nd test if the 1st test is false.
  if ( test1 ); then
    code a
  elif ( test2 ); then
    code b
  fi

• elif.ksh:Korn shell script for this lesson.


• Tutorial 6E Covers:
• Introduces the "elif" statement into an if/then/else/fi block.
  This lesson demontrates the use of else at the end of an elif statement.
  if ( test1 ); then
    code a
  elif ( test2 ); then
    code b
  else
    code c
  fi

• elif2.ksh:Korn shell script for this lesson.