libcln6 software package provides Class Library for Numbers (C++), you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libcln6
libcln6 is installed in your system.
Make ensure the libcln6 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libcln6 *
You will get with libcln6 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Libraries |
| Package | libcln6 |
| Version | 1.3.4-1 |
| Description | Class Library for Numbers (C++) |
| Sub Section | libs |