Hi folks, thanks for the answwers, but I believe, my question was not clear enough.
What I wanted to know, if there is an option, like apt-get upgrade --keep-my-configs (or --overwrite-my-config) or aptitude upgrade --keep-my-configs (or overwrite-my-config) or similar, to let my changed configs be overwritten (i.e. by the maintainers config), or left it kept. I do not want the interactive dialog, which is questioning me during an upgrade. Please note, I do not want interactive question fully deactivated (which is possible), just deactivate it for own edited configs. Hope, that makes it clearer. Is there any tag, which can be set using apt or aptitude in commandline? Best Hans