Which command do you use to change file extensions?

To change file extensions in most operating systems, you can use the "rename" or "mv" command, depending on the platform you are working on. Here's how you can use these commands:

On Linux, macOS, and most Unix-based systems, you can use the "mv" command (short for "move") to rename files and change their extensions. Open the terminal and navigate to the directory where the file is located. Then, use the following syntax:

mv old_filename new_filename

For example, if you want to change a file named "file.txt" to "file.csv," you can run:

mv file.txt file.csv

On Windows, you can use the "rename" command to change file extensions. Open the command prompt and navigate to the directory where the file is located. Then, use the following syntax:

rename old_filename new_filename

For example, if you want to change a file named "file.txt" to "file.csv," you can run:

rename file.txt file.csv

Keep in mind that when changing file extensions, the actual content and format of the file may not change. The extension is primarily used to determine how the operating system handles and recognizes the file type.