What is the main use of HEAD command?

The main use of the HEAD command is to display the first few lines of a file or the initial part of its content, which allows users to quickly examine the file's structure and contents without opening the entire file. This is particularly useful for large files, as it helps to determine if the file is of interest or relevant for further processing. In addition, when used with HTTP requests, the HEAD command retrieves response headers without the body, providing metadata about the resource without transferring the entire content.