What happens when you use 'cd [filename]'?

When you use 'cd [filename]', it changes the current working directory to the subdirectory specified by the filename. The 'cd' command stands for "change directory," and its primary function is to navigate the directory structure of the operating system. If the filename provided corresponds to a valid subdirectory, executing this command will switch your active directory to that particular location, allowing you to access files and execute commands within that subdirectory.

Using this command effectively enables users to maneuver through the file system to improve workflow and organization while handling files and directories in a command-line interface. This is essential for managing files efficiently in a hierarchical directory structure.

The other possibilities do not accurately describe the function of the 'cd' command. It does not change to the root directory, display file contents, or delete files. The command is specifically designed to navigate through directories rather than perform those other actions.