This is Debian GNU/Linux's prepackaged version of Ian Jackson's xtrlock utility. This package provides a minimal X display lock program. This package was put together by Stephen Early , from the source by Ian Jackson, which he obtained from Usenet. Apart from a couple of bugfixes the changes were very minimal - merely adding support for the Debian package maintenance scheme, by adding various debian.* files. This package is now maintained by Matthew Vernon . Program Copyright (C) 1993, 1994 Ian Jackson. Modifications for Debian GNU/Linux Copyright (C) 1995 Stephen Early. Modifications for Debian GNU/Linux since v2.0-9 Copyright (C) 2005-2012 Matthew Vernon This program and its documentation are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, 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, a copy of the GNU General Public License version 3 may be found in /usr/share/common-licenses/GPL-3. It is also included in the source package as GPL-3.txt