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.