grads software package provides Grid Analysis and Display System for earth science data, 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 grads
grads is installed in your system.
Make ensure the grads package were installed using the commands given below,
$ sudo dpkg-query -l | grep grads *
You will get with grads package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | grads |
| Version | 3:2.1.0-1 |
| Description | Grid Analysis and Display System for earth science data |
| Sub Section | Utils |