These are for command sequences, background jobs, etc. The result is one word. The result is one word. Quotes Back quotes mean run the command and substitute the output. Within a function use return instead of exit.
Functions are good for encapsulations.
You can pipe, redi- rect input, etc. to functions. This runs the shell script as a separate shell. This runs the shell script from within the current shell script. The second form is useful for configuration files where environment variable are set for the script. Using configuration files in this manner makes it possible to write scripts that are automatically tailored for differ- ent situations.