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| Chapter 5 |

# 5. The C Shell

Contents:
Overview of Features
Syntax
Variables
Expressions
Command History csh shell
Built-in C Shell Commands
Job Control
Invoking the Shell

This section describes the C shell, so named because many of its programming constructs and symbols resemble those of the C programming language. The following topics are presented:

- Overview of features

- Syntax

- Variables

- Expressions

- Command history

- Built-in commands

- Job control

- Invoking the shell

## 5.1 Overview of Features

Features of the C shell include:

- Input/output redirection

- Wildcard characters (metacharacters) for filename abbreviation

- Shell variables for customizing your environment

- Integer arithmetic

- Access to previous commands (command history)

- Command name abbreviation (aliasing)

- A built-in command set for writing shell programs

- Job control

4.9 Restricted Shells |  | 5.2 Syntax