Components of a shell program


	Lesson 1 Components of a shell program
		The previous module introduced you to many of the available programming tools and explained when shell scripts are the best tool to solve a problem. This module provides more information to help you understand the commands and tools you will be using to create your first shell script. By the end of this module, you will be able to: Explain situations in which a shell script is most useful Define external and built-in commands List commands used to communicate with users Identify how tests are used within shell scripts Define the different variable types used in shell scripts Describe how control structures determine how a script operates