The Unix Command Line: Files & Folders - …
Manipulating Files and Folders: cp - C o p y a file (or directory). Notes: The cp command does not understand all of the characteristics of files on HFS+ partitions, and will not completely copy files that have resource forks, type&creator codes, or other Mac-specific characteristics. To fully copy such files, use the Finder, or the ditto -rsrcFork command.