Lines from Unix's source code have been copied into the heart of Linux, sometimes exactly and sometimes in a modified form designed to disguise their origin, SCO Group Chief Executive Darl McBride said Thursday. McBride's accusation cuts to the heart of the open-source movement's legal and philosophical underpinnings.
Bruce Perens, a former leader of the Debian version of Linux and an unofficial spokesman for open-source programmers, derided SCO chief McBride's claims as an attempt to foster fear, uncertainty and doubt—“FUD,” in computing parlance.