file:tldr:1d0cc

The file -i ${filename} command is used to determine the type and encoding of a given file.

Here's a breakdown of the command:

• file: It is a utility command in Unix-like systems that identifies the type of a given file based on its content.
• -i: This is an option flag for the file command, which tells it to output MIME type information.
• ${filename}: This is a placeholder for the actual filename or path that you want to check. You need to replace ${filename} with the specific file you want to examine.

When you run the command with an actual filename substituted for ${filename}, it will provide information about the file's content type using MIME (Multipurpose Internet Mail Extensions) type.

For example, if you run file -i example.txt, it might output example.txt: text/plain; charset=utf-8, indicating that the file is a plain text file encoded using UTF-8.