This is Debian's prepackaged version of patch, Larry Wall's program that allows you to apply diffs to a file automagically. The current maintainer for this package is Laszlo Boszormenyi (GCS) <gcs@debian.org>. Previous maintainers were Bill Mitchell <mitchell@mdd.comm.mot.com>, Darren Stalder <torin@daft.com>, Adrian Bunk <bunk@fs.tum.de>, Michael Fedrowitz <michaelf@debian.org> and Christoph Berg <myon@debian.org>. The upstream source is available at 'ftp://ftp.gnu.org/gnu/patch/', resp. 'ftp://alpha.gnu.org/gnu/diffutils/'. Upstream Maintainer: Paul Eggert <eggert@twinsun.com> Copyright: Copyright (C) 1984, 1985, 1986, 1987, 1988 Larry Wall Copyright (C) 1989-2012 Free Software Foundation, Inc. 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 3 of the License, 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 systems the complete text of the GNU General Public License can be found in '/usr/share/common-licenses/GPL'.