bibtex --version (return code: 0)
BibTeX 0.99d (TeX Live 2015/Debian) kpathsea version 6.2.1 Copyright 2015 Oren Patashnik. There is NO warranty. Redistribution of this software is covered by the terms of both the BibTeX copyright and the Lesser GNU General Public License. For more information about these matters, see the file named COPYING and the BibTeX source. Primary author of BibTeX: Oren Patashnik.
bibtex --help (return code: 0)
Usage: bibtex [OPTION]... AUXFILE[.aux] Write bibliography for entries in AUXFILE to AUXFILE.bbl, along with a log file AUXFILE.blg. -min-crossrefs=NUMBER include item after NUMBER cross-refs; default 2 -terse do not print progress reports -help display this help and exit -version output version information and exit Email bug reports to email@example.com.