/usr/bin/listbib is in texlive-bibtex-extra 2014.20141024-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../share/texlive/texmf-dist/scripts/listbib/listbib
/usr/bin/../share/texlive/texmf-dist/scripts/listbib/listbib