This is rl, a command-line tool to randomize lines.

Arthur de Jong is both the upstream and Debian package maintainer, so
there are no differences between the Debian package and the upstream
version. rl can be downloaded at
http://ch.tudelft.nl/~arthur/rl/.

Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Arthur de Jong.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

On Debian GNU/Linux systems, the complete text of
the GNU General Public License can be found in
/usr/share/common-licenses/GPL.