This is the Debian packaged version of strace. For a complete list of changes from the upstream version please see the changelog. The upstream sources can be found at https://github.com/strace/strace/ and https://gitlab.com/strace/strace/ This is the copyright as found in the upstream sources: Copyright (c) 1991, 1992 Paul Kranenburg Copyright (c) 1993 Branko Lankester Copyright (c) 1993 Ulrich Pegelow Copyright (c) 1995, 1996 Michael Elizabeth Chastain Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey Copyright (c) 1998-2001 Wichert Akkerman Copyright (c) 2001-2022 The strace developers. All rights reserved. strace is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. strace 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. On Debian systemsm the full text of the LGPL v2.1 can be found in /usr/share/common-licenses/LGPL-2.1 . strace test suite is provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.