apt-diff: Compare and save APT packages in a Debian-based system

Summary: apt-diff is a tool to compare and save listings of APT packages installed in a Debian-based system.

Installation: The main file apt-diff.py and its symlink apt-diff should be copied into /usr/local/bin. Python 3 is required.

How to use: apt-diff --help

usage: apt-diff [-h] [-s] [-f] [-r] [{compare,save}] [target] [source]

Compare or save apt packages

positional arguments:
 {compare,save} compare two APT snapshots or save APT snapshot
 target target APT snapshot, defaults to current directory
 source source APT snapshot, defaults to current system

optional arguments:
 -h, --help show this help message and exit
 -s, --summary APT snapshot comparison summary
 -f, --filter filter APT snapshot comparison
 -r, --reverse reverse APT snapshot comparison