link
Creates a hard link to an existing file.
Creates a new directory entry NEWFILE that refers to the same inode
as OLDFILE. Both paths must be on the same filesystem. The link count
of the file is incremented. Uses std::fs::hard_link. Returns 1 on
success, 0 on failure (and sets $!).
Synopsis
link $oldfile, $newfile or die "Cannot link: $!";
link '/data/original', '/data/hardlink';