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Course Catalog

Creating Basic UNIX Shell Scripts

( WT-1310-180 )

Course Description

Course Offered in Partnership With DigitalThink

This course is designed for UNIX users who are ready to begin exploring the power and support available in the shell environment. This course covers the essential aspects of shell programming and provides an overview of the similarities and differences among the three most popular shells: the Bourne shell, the C shell, and the Korn shell.

This course requires a computer running Windows, Macintosh, or UNIX, and telnet software.

eMentoring Services are included with this course.

Course length: 8 hours

Course details
id: WT-1310-180
subscription duration: 180 days
list price: $ 325.00

Languages Offered

This course is currently available in English only.

Prerequisites

To succeed fully in this course, students should be able to:

Demonstrate completion of UNIX Fundamentals Bundle, or equivalent knowledge and experience

Skills Gained

Upon completion of this course, you should be able to:

Define a shell program and how it interacts with your UNIX system

List the components that make up all shell scripts

Describe the differences between popular shells

Use different types of shell variables to hold data values

Create coherent script objectives and designs

Read and write files from within a script

Define appropriate tests for conditions in a script

Use different looping operations to control script flow

Redirect input and output to control how data is handled in a script

Related Courses

After: Advanced UNIX Shell Programming

Course Content

Module 1: Course introduction Back To Top

Course introduction

Prerequisites

What you need

Course resources

Your learning community

Meet your instructor

The Course Project

Module 2: Defining shell programming

Defining shell programming

What is a shell?

What shells are available?

Deciding which shell to program for

Shell scripts within UNIX

Interpreted and compiled programs

Understanding other scripting options

When to use a shell script, other script, or compiled program

Module wrap-up

Module 3: Components of a shell program

Components of a shell program

A shell script as a macro

Components of a shell program: external and built-in commands

Tools to manage input and output

Tests

Variables

Components of a shell script: control structures

Regular expressions

Module wrap-up

Module 4: Writing your first script

Writing your first script

An interactive "script" on the command line

Defining a script file

Using a text editor

A command to write to the screen

A command to read keyboard input

Including comments in shell scripts

Setting the file permissions

Running the script

Module wrap-up

Module 5: Working with variables

Working with variables

Accessing command-line arguments

Using predefined system variables

Accessing environment variables

Creating your own variables

Variable interpretation

Using strings in variables

Using numbers in variables

Doing math with variables

Using array variables

Module wrap-up

Module 6: Designing more complex scripts

Designing more complex scripts

Defining a script objective

Diagramming script flow

Deciding on tests and loops

Checking commands

Including error trapping

Making the script portable

Documenting the script

Module wrap-up

Module 7: Reading input and writing to files

Reading input and writing to files

Using scripts with non-text files

Interacting with files through other commands

Retrieving user input with read

Reading data from a file

Writing text lines to a file

Printing formatted information

Storing structured data in a file

Module wrap-up

Module 8: Testing conditions

Testing conditions

How to use if/then/else statements

Learning to use tests

Using Boolean operators

Testing file conditions

Testing numeric and string conditions

Using command results as tests

Nesting else statements

Using case statements in place of nested else

Module wrap-up

Module 9: Looping structures

Looping structures

When to use loops

Defining a test to control a loop

Using for loops

Using while loops

Using select loops

Using until loops

Using break and continue to control flow

Module wrap-up

Module 10: Redirection

Redirection

Defining STDIN and STDOUT

Defining STDERR

Reviewing output redirection

Appending output

Using input redirection

Using a pipe

Using a tee for redirection

Including redirected input within a script

Module wrap-up

Module 11: Course conclusion

Course conclusion

Where do you go from here?

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