exonerate software package provides generic tool for pairwise sequence comparison, 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 exonerate
exonerate is installed in your system.
Make ensure the exonerate package were installed using the commands given below,
$ sudo dpkg-query -l | grep exonerate *
You will get with exonerate package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | exonerate |
| Version | 2.4.0-2 |
| Description | generic tool for pairwise sequence comparison |
| Sub Section | Science |