inspircd software package provides Modular IRCd written in C++, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install inspircd
inspircd is installed in your system.
Make ensure the inspircd package were installed using the commands given below,
$ sudo dpkg-query -l | grep inspircd *
You will get with inspircd package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | inspircd |
| Version | 2.0.23-1 |
| Description | Modular IRCd written in C++ |
| Sub Section | Net |