sudo apt-get install debconf-2.0
Você terá:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package debconf-2.0 is a virtual package provided by:
debconf 1.5.58ubuntu1
cdebconf 0.198ubuntu1
You should explicitly select one to install.
Em vez de usar o debconf-2.0, você deve usar o debconf:
sudo apt-get download debconf