This is debdiff, from the Debian devscripts package, version 2.16.2ubuntu3 This code is copyright 1999,2000,2001 by Julian Gilbey <jdg@debian.org>, based on original code which is copyright 1998,1999 by Yann Dirson <dirson@debian.org> This program comes with ABSOLUTELY NO WARRANTY. You are free to redistribute this code under the terms of the GNU General Public License, version 2 ONLY.

Usage: debdiff [option] or: debdiff [option] ... deb1 deb2 or: debdiff [option] ... changes1 changes2 or: debdiff [option] ... dsc1 dsc2 or: debdiff [option] ... --from deb1a deb1b ... --to deb2a deb2b ... Valid options are: --no-conf, --noconf Don't read devscripts config files; must be the first option given --help, -h Display this message --version, -v Display version and copyright info --move FROM TO, The prefix FROM in first packages has -m FROM TO been renamed TO in the new packages only affects comparing binary packages (multiple permitted) --move-regex FROM TO, The prefix FROM in first packages has been renamed TO in the new packages only affects comparing binary packages (multiple permitted), using regexp substitution --dirs, -d Note changes in directories as well as files --nodirs Do not note changes in directories (default) --nocontrol Skip comparing control files --control Do compare control files --controlfiles FILE,FILE,... Which control files to compare; default is just control; could include preinst, etc, config or ALL to compare all control files present --wp, --wl, --wt Pass the option -p, -l, -t respectively to wdiff (only one should be used) --wdiff-source-control When processing source packages, compare control files as with --control for binary packages --no-wdiff-source-control Do not do so (default) --show-moved Indicate also all files which have moved between packages --noshow-moved Do not also indicate all files which have moved between packages (default) --renamed FROM TO The package formerly called FROM has been renamed TO; only of interest with --show-moved (multiple permitted) --quiet, -q Be quiet if no differences were found --exclude PATTERN Exclude files that match PATTERN --ignore-space, -w Ignore whitespace in diffs --diffstat Include the result of diffstat before the diff --no-diffstat Do not do so (default) --auto-ver-sort When comparing source packages, ensure the comparison is performed in version order --no-auto-ver-sort Do not do so (default) --unpack-tarballs Unpack tarballs found in the top level source directory (default) --no-unpack-tarballs Do not do so Default settings modified by devscripts configuration files: (none) Use the diffoscope package for deeper comparisons of .deb files.