3.7 Executing Commands

Simple Command Expansion:    How Bash expands simple commands before

executing them.

Command Search and Execution:    How Bash finds commands and runs them.
Command Execution Environment:    The environment in which Bash

executes commands that are not shell builtins.

Environment:    The environment given to a command.
Exit Status:    The status returned by commands and how Bash

interprets it.

Signals:    What happens when Bash or a command it runs

receives a signal.