6. Bash Features

This section describes features unique to Bash.

6.1 Invoking Bash		Command line options that you can give to Bash.
6.2 Bash Startup Files		When and how Bash executes scripts.
6.3 Interactive Shells		What an interactive shell is.
6.4 Bash Conditional Expressions		Primitives used in composing expressions for the `test` builtin.
6.5 Shell Arithmetic		Arithmetic on shell variables.
6.6 Aliases		Substituting one command for another.
6.7 Arrays		Array Variables.
6.8 The Directory Stack		History of visited directories.
6.9 Controlling the Prompt		Controlling the PS1 string.
6.10 The Restricted Shell		A more controlled mode of shell execution.
6.11 Bash POSIX Mode		Making Bash behave more closely to what the POSIX standard specifies.