alfa software package provides Automated Line Fitting Algorithm, 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 alfa
alfa is installed in your system.
Make ensure the alfa package were installed using the commands given below,
$ sudo dpkg-query -l | grep alfa *
You will get with alfa package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | alfa |
| Version | 1.0-2 |
| Description | Automated Line Fitting Algorithm |
| Sub Section | Science |