Is there a way to reset all ubuntu config files, a batch procedure?. No the local config files, I mean all /etc config files.
I know how to do that one by one but that is a job for weeks or work.
No - there is no standard command.
But with the following command you may inspect which configurations may be different from the "default" configuration provided by the ubuntu packages.
find /etc/ -name "*.dpkg-*"
#
) , copy/modify/add line(s), and leave a comment as to why the file was edited.