pktogf --version (return code: 0)
PKtoGF 1.1 (TeX Live 2015/Debian) kpathsea version 6.2.1 There is NO warranty. Redistribution of this software is covered by the terms of both the PKtoGF copyright and the Lesser GNU General Public License. For more information about these matters, see the file named COPYING and the PKtoGF source. Primary author of PKtoGF: Tomas Rokicki.
pktogf --help (return code: 0)
Usage: pktogf [OPTION]... PKNAME [GFFILE] Translate the bitmap font PKNAME to GFFILE. Default GFFILE is basename of PKNAME extended with `gf'. -help display this help and exit -verbose display progress reports -version output version information and exit Email bug reports to email@example.com.