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UNIX Training    enquiry@advancedittraining.co.uk

Shell Programming 0803 - Course duration: 3 days

Course Objectives:

you will learn how to

Explain the purpose of shell programs. Recognize applications for shell programs. Design and write shell programs of moderate complexity, us ing variables, special variables, flow control mechanisms, operators, arithmetic, and functions. Debug shell programs using several different debugging techniques. Write "real-time" shell scripts that respond to and handle asynchronous events with the trap command. Manage multiple concurrent processes to achieve higher utilization of UNIX.

Prerequisites

Fundamentals of UNIX.

Course Contents:

1. Course Introduction

  • Course Overview
  • Objectives
  • Suggested References

2. UNIX Processes

  • What is a Process?
  • Process Structure
  • The ps Utility
  • Options to the ps Utility
  • Background Commands (&)
  • Killing Background Processes
  • Redirecting the Standard Error

3. Getting Started

  • What is a Shell?
  • Running Scripts
  • Specifying the Script's Interpreter
  • The PATH Environment Variable
  • Sub-shells

4. Variables

  • Shell Variables
  • The read Command
  • The export Command
  • The Shell Environment
  • Variable Substitution
  • Command Substitution

5. The Login Process

  • The Login Pro
  • cess
  • The System Profile Script
  • Your .profile Script
  • The . Command

6. Conditional Statements

  • The Exit Status of Commands
  • Command Line Examples
  • The test Command
  • The if-then-else Construct
  • The elif Construct
  • case Statements

7. Loops

  • The forLoop
  • The while Loop
  • break and continue
  • Reading Lines From Files
  • Using Arrays with Loops

8. Special Variables

  • $$ - PID of Shell
  • Command-Line Arguments
  • $# - Number of Arguments
  • $* - All Arguments
  • The shift Command
  • The set Command
  • Getting Options

9. Quoting Mechanisms

  • Single vs. Double Quotes
  • What is a Here Document?
  • Using a Here Document
  • Here Document Quoting
  • Ignoring Leading Tabs

10. Functions

  • Shell Functions
  • Passing Arguments to Functions
  • Returning Values from Functions
  • Function Libraries

11. Advanced Programming

  • Shell Arithmetic
  • The select Statement
  • Terminal Independence in Scripts
  • The eval Command

12. Debugging Techniques

  • Using echo
  • Using Standard Error
  • Options for
  • Debugging
  • Script Tracing
  • Conditional Debugging

13. Shell IPC

  • Co-processes
  • The print and read Commands
  • Signals
  • The trap Command
  • Named Pipes
  • The wait Command


Standard Tuition 

2 days ?75
3 days ?115
4 days ?355
5 days ?595

For more information click here....

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