Bash Features (Bash Reference Manual)

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.