systraq 0.0.20081217-7 (armhf binary) in ubuntu xenial

 Systraq daily sends you an email listing the state of your system.
 Furthermore, if critical files have changed, you'll get an email within a
 shorter notice. Systraq consists of few very small shell scripts.
 .
 It can help you implementing a not too strict security policy. For more
 demanding systems, you'd better use something like tripwire. Make sure you
 really want to do the monitoring this script offers: it might not comply with
 your site's privacy policy. Getting informed when users' config file change
 might be too intrusive.
 .
 Other similar tools are available in Debian (`diffmon' for instance), but
 systraq is less intrusive because it can warn for file changes without mailing
 a complete diff (which is not desirable for e.g. /etc/shadow).