If you are using a Windows machine the .aws folder should be present inside your user profile folder and may be found as dir %UserProfile%.aws. You may also use the notepad command to edit files in a notepad instead of the cat command. Remember to save the notepad file if you are editing:
CLI commands that feature in this book should work on the terminals of a UNIX-style operating system, such as Linux or Mac, without any or many changes. Minor modifications may be needed to execute them in other platforms. For example, specifying multi-line commands using has to be replaced with ^ for the Windows OS command prompt, and ` for PowerShell.