bagel software package provides Computational Chemistry Package, 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 bagel
bagel is installed in your system.
Make ensure the bagel package were installed using the commands given below,
$ sudo dpkg-query -l | grep bagel *
You will get with bagel package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | bagel |
| Version | 0.0~git20160507-3 |
| Description | Computational Chemistry Package |
| Sub Section | Science |