Korn Shell Programming

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Course Length:

4 Days

Course Description:

This course describes the Korn Shell. The shell as a programming language is featured. The course also thoroughly treats other shell functions such as the shell as the user interface, the shell as a customization tool for the user environment, and the shell as a front end for command customization. Labs are given throughout the course to reinforce the lectures.

Who Should Attend:

The course is intended for UNIX users who wish to increase their productivity.

Benefits of Attendance:

Upon completion of this course, students will be able to:

• Understand process creation.
• Recognize and use shell metacharacters.
• Recall commands for automatic execution (Korn and C Shell).
• Launch and control jobs (Korn and C Shell).
• Provide front ends to well known commands.
• Create and use shell environment variables.
• Customize your environment using many shell productivity aids.
• Write non-trivial shell scripts.
• Write shell functions (Korn and Bourne).

Prerequisites:

Students must have completed the Introduction to UNIX, Introduction to Solaris, or Introduction to LINUX course or have equivalent knowledge.

Course Outline:

• Chapter 1: Shell Initialization
  1. User Interfaces
  2. Functions of the Shell
  3. History of the Shell
  4. Which Shell Am I Using?
  5. How is My Shell Started?
  6. Shell Startup Files
  7. Korn Shell Logic
  8. Spawning Processes
  9. Background Processing
  10. The kill and jobs command
  11. Suspending Jobs
• Chapter 2: Shell Variables
  1. Standard Files
  2. Korn Shell Variables
  3. The typeset Command
  4. Arrays
  5. Built-in Shell Variables
  6. Creating Your Own Variables
  7. Special Shell Variables
  8. More on Arrays
  9. Variable Expansions
  10. Variable Substitutions
  11. Quoting
  12. File Name Generation Character
• Chapter 3: Productivity Aids
  1. Command Line Editing
  2. Aliases
  3. The history Command
  4. Functions
  5. The set Command
  6. The User Environment
• Chapter 4: Programming The Shell
  1. Perspective
  2. Creating a Script
  3. Sending Arguments to a Script
  4. Front Ends
  5. Decision Making
  6. The if Statement
  7. Operators
  8. if Variations
  9. Loops
  10. The for Loop
  11. The while Loop
  12. The until Loop
  13. The read Statement
  14. The case Statement
  15. break and continue
• Chapter 5: Miscellaneous
  1. Korn Shell Arithmetic
  2. here Documents
  3. The getopts Command
  4. The trap Command
  5. File I/O
  6. Debugging a Script
• Chapter 6: Examples Of Scripts
  1. A Front End Example
  2. Swapping Two Files
  3. Count Files in Path Directories
  4. Frequency Count of Words in a
  5. File
  6. Add Values From Field n of a
  7. File
  8. Prototyping a Large Project
• Chapter 7: Tables
  1. Built-in Shell Variables
  2. Built-in Shell Commands
  3. Control Flow Constructs
  4. Operators
  5. Variable Substitution
  6. Other Shells
  7. Comparison with C and
  8. Bourne Shells
  9. C Shell Control Flow Constructs
  10. Differences Between sh & ksh
• Chapter 8: Review Of Common Unix Filters
  1. grep Command - Find Lines Matching a Pattern
  2. wc command - Count Words, Lines
  3. sort command - Sort Lines of a File
  4. head Command - Show First Few Lines of a File
  5. tail command - Show Last Few Lines of a File
  6. tr command - Translate Characters
  7. cut command - Cut chars or Fields
  8. od - Octal Dump a File
  9. paste Command - Paste Lines
  10. awk command - Data Retrieval Language
  11. sed Command - Stream Editor