coinor-symphony software package provides COIN-OR solver for mixed-integer linear programs, 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 coinor-symphony
coinor-symphony is installed in your system.
Make ensure the coinor-symphony package were installed using the commands given below,
$ sudo dpkg-query -l | grep coinor-symphony *
You will get with coinor-symphony package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | coinor-symphony |
| Version | 5.6.1-1+b1 [amd64, arm64, arme |
| Description | COIN-OR solver for mixed-integer linear programs |
| Sub Section | Science |