pooltype --version (return code: 0)
POOLtype 3.0 (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 POOLtype copyright and the Lesser GNU General Public License. For more information about these matters, see the file named COPYING and the POOLtype source. Primary author of POOLtype: D.E. Knuth.
pooltype --help (return code: 0)
Usage: pooltype [OPTION]... POOLFILE[.pool] Display the string number of each string in POOLFILE. -help display this help and exit -version output version information and exit Email bug reports to email@example.com.