dpkg-reconfigure
Explanation
The dpkg-reconfigure command is used to reconfigure an already installed package. It asks configuration questions for the package, just as if the package were being installed for the first time. This can be useful if the user wants to change some settings or options for the package without reinstalling it. The dpkg-reconfigure command can also be used to fix a broken package configuration or to restore the default settings. References:
* dpkg-reconfigure(8) - Linux man page
* Linux Professional Institute: Exam 101 Objectives