mktexlsr --version (return code: 0)
mktexlsr $Id$ kpathsea version 6.2.1 Copyright 2015 Karl Berry & Olaf Weber. License LGPLv2.1+: GNU Lesser GPL version 2.1 or later <http://gnu.org/licenses/lgpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
mktexlsr --help (return code: 0)
Usage: mktexlsr [OPTION]... [DIR]... Rebuild ls-R filename databases used by TeX. If one or more arguments DIRS are given, these are used as the directories in which to build ls-R. Else all directories in the search path for ls-R files ($TEXMFDBS) are used. Options: --dry-run do not actually update anything --help display this help and exit --quiet cancel --verbose --silent same as --quiet --verbose explain what is being done --version output version information and exit If standard input is a terminal, --verbose is on by default. For more information, see the `Filename database' section of Kpathsea manual available at http://tug.org/kpathsea. Report bugs to: email@example.com TeX Live home page: <http://tug.org/texlive/>