many and many and many times I see sudo dpkg-reconfigure foo what is that? seems to be configuration? but what is the relation between that and .conf file? is there any file which store this configuration. If you need example sudo dpkg-reconfigure postfix. I need some more description what I know is just it is for package configuration.
If you wanted to change those options afterwards, though, you can use
Note that not all packages have user-configurable options, so even if a package installs a configuration file in