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.