 | Chapter 4 |  |
| Chapter 4 | |
Contents:
Overview of Features
Syntax
Variables
Arithmetic Expressions
Command History
Built-in Commands (Bourne and Korn Shell)
Job Control
Invoking the Shell
Restricted Shells
This section presents the following topics:
Overview of features
Syntax
Variables
Arithmetic expressions (Korn shell only)
Command history (Korn shell only)
Built-in commands
Job control
Invoking the shell
Restricted shells
The Bourne shell is the standard shell and provides the following features:
Input/output redirection.
Wildcard characters (metacharacters) for filename abbreviation.
Shell variables for customizing your environment.
A built-in command set for writing shell programs.
Job control (beginning in SVR4).
The Korn shell is a backward-compatible extension of the Bourne shell. Features that are valid only in the Korn shell are so indicated.
Command-line editing (using vi or emacs).
Access to previous commands (command history).
Integer arithmetic.
More ways to match patterns and substitute variables.
Arrays and arithmetic expressions.
Command name abbreviation (aliasing).
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| 3.5 Differing Features |  | 4.2 Syntax |
