Keep config?

[Hans <hans.ullrich@loop.de>]

Hi folks,

just an easy question: How can I force to keep or overwrite a configuration 
during an upgrade? As I do not want it set fixed, I am searching for a 
solution by setting a command. 

I am sure, this can be done with setting a tag (so that I am not asked, if I 
want to overwrite or keep), and searched through the manual of apt, aptitude 
and dpkg, but somehow I must have something overseen (or misundertood).

What is the solution and where is this described?

Thanks for your help to this silly problem.

Best regards

Hans