Describe the concept of environment variables and explain their significance in shell scripting.

The concept of environment variables plays a significant role in shell scripting. Environment variables are dynamic values that are part of the environment in which a process runs. They hold information about the system environment, user preferences, and various settings that can be accessed by programs and scripts. In shell scripting, environment variables serve several important purposes: 1. Configuration and Customization: * Environment variables provide a convenient way to configure and customize the behavior of shell scripts. * By using environment variables, users can define specific settings and preferences that affect the execution of scripts without modifying the script's code. * This allows for flexibility and adaptability, as scripts can behave differently depending on the values of environment variables. 2. Passing Data Between Processes: * Environment variables act as a communication mechanism between different processes and scripts. * When a shell script is executed, it inherits the environment variables from its parent pr....