Chapter 28. Programming the Bourne Again Shell

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IN THIS CHAPTER

Control Structures

878

File Descriptors

911

Parameters and Variables

914

Array Variables

914

Locality of Variables

916

Special Parameters

918

Positional Parameters

920

Builtin Commands

926

Expressions

940

Shell Programs

948

A Recursive Shell Script

949

The quiz Shell Script

952

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Chapter 7 introduced the shells and Chapter 9 went into detail about the Bourne Again Shell. This chapter introduces additional Bourne Again Shell commands, builtins, and concepts that carry shell programming to a point where it can be useful. The first part of this chapter covers programming control structures, which are also known as control flow constructs. These structures allow you to write scripts that can ...

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