Bash Shell Scripting - Overview - Understanding Variables

This video tutorial provides an overview of variables, including naming conventions, types of variables such as local, environment, and shell variables. It covers the source command, positional parameters, special variables, and the declare command. The tutorial also discusses read-only variables, set and unset commands, and concludes with command substitution.

Describe the purpose of the source command in relation to variables.

What is command substitution and how is it relevant to the module?