$ sudo apt-get update
$ sudo apt-get install pppdcapiplugin 

pppdcapiplugin is installed in your system.

Make ensure the pppdcapiplugin package were installed using the commands given below,

$ sudo dpkg-query -l | grep pppdcapiplugin *

You will get with pppdcapiplugin package name, version, architecture and description in a table

pppdcapiplugin package basic information: