Describe the process of writing functions in shell scripts and provide a practical example.

In shell scripting, functions provide a way to encapsulate a group of commands into a single reusable unit. They help modularize code, improve readability, and enhance the maintainability of shell scripts. Here's the process of writing functions in shell scripts: 1. Function Declaration: * To declare a function, use the following syntax: ``` bash`function\_name() { # Function body # Contains the commands and logic of the function }` ``` 2. Function Name: * Choose a descriptive and meaningful name for your function. It should reflect the purpose or action performed by the function. 3. Function Body: * The function body contains the commands and logic that define the behavior of the function. * It can include any valid shell script commands, variables, loops, conditionals, and other functions. 4. Function Invocation: * To execute a function, simply call its name followed by par....