Chapter 5: Bash Features

This section describes features unique to Bash.

Invoking Bash Command line options that you can give to Bash.

Bash Startup Files When and how Bash executes scripts.

Is This Shell Interactive? Determining the state of a running Bash.

Bash Builtins Table of builtins specific to Bash.

The Set Builtin This builtin is so overloaded it deserves its own section.

Bash Conditional Expressions Primitives used in composing expressions for the test builtin.

Bash Variables List of variables that exist in Bash.

Shell Arithmetic Arithmetic on shell variables.

Aliases Substituting one command for another.

Arrays Array Variables.

The Directory Stack History of visited directories.

Printing a Prompt Controlling the PS1 string.

The Restricted Shell A more controlled mode of shell execution.

Bash POSIX Mode Making Bash behave more closely to what the POSIX standard specifies.