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6 Bash Features

This chapter 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.
Interactive Shells:    What an interactive shell is.
Bash Conditional Expressions:    Primitives used in composing expressions for

the test builtin.

Shell Arithmetic:    Arithmetic on shell variables.
Aliases:    Substituting one command for another.
Arrays:    Array Variables.
The Directory Stack:    History of visited directories.
Controlling the Prompt:    Customizing the various prompt strings.
The Restricted Shell:    A more controlled mode of shell execution.
Bash POSIX Mode:    Making Bash behave more closely to what

the POSIX standard specifies.