Binary package “diffmon” in ubuntu bionic
Tool for reporting changes in system configuration
This tool is run by a nightly cron job, and takes a `diff' of specified system
configuration files and emails them to a specified email address. Options
to diff can be specified. This is useful in friendly environments where there
are multiple sysadmins working on configuration files/setups and everyone's
changes are reported. CVS is a better answer, but most of us don't want to
have the hassle of putting system files in a repository.