$ sudo apt-get update
$ sudo apt-get install eiskaltdcpp 

eiskaltdcpp is installed in your system.

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

$ sudo dpkg-query -l | grep eiskaltdcpp *

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

eiskaltdcpp package basic information: