[转]How To Rebuild Your Debconf Database

First, rebuild debconf's own debconf database entries:

dpkg-reconfigure debconf

 
Then, rebuild the debconf database for everything else:

for pkg in $(dpkg-query --show | awk 'print $1'); do echo ; echo "--> $pkg" ; echo ; dpkg-reconfigure --frontend=noninteractive --priority=critical $pkg < /dev/null ; done