Linkd.exe - Windows 2003 Resource Kit Utility
This command-line tool links an NTFS directory to a target object. LinkD grafts the target name directly into the name space at the specified source directory, so that the source directory subsequently acts as a name-space junction. A junction acts as a surrogate, standing in for the target object in the directory tree. The source directory must reside on a drive formatted with NTFS 5.0. The destination or target of the link can be any valid Microsoft® Windows® 2000 directory name, device name, or object name. When the target name does not resolve to a directory or a device, open calls fail.