The command-line interface (CLI) is a powerful tool that allows users to interact with their operating system by entering commands. These commands, also known as command-line utilities or shell commands, can be used to perform various tasks such as navigating the file system, manipulating files and directories, and controlling system processes. There are many command-line utilities available, but some of the most commonly used ones include: cd : The 'cd' command is used to change the current working directory. For example, to navigate to the Documents directory, you would enter 'cd' Documents. ls : The 'ls' command is used to list the contents of a directory. You can use it to see the files and subdirectories within a directory. For example, to list the contents of the current directory, you would enter 'ls ' . mkdir : The mkdir command is used to create a new directory. For example, to create a new directory called Project, you would enter mkdir Project...