geoip-database software package provides IP lookup command line tools that use the GeoIP library (country database), 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 geoip-database
geoip-database is installed in your system.
Make ensure the geoip-database package were installed using the commands given below,
$ sudo dpkg-query -l | grep geoip-database *
You will get with geoip-database package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Network |
| Package | geoip-database |
| Version | 20161017-1 |
| Description | IP lookup command line tools that use the GeoIP library (country database) |
| Sub Section | Net |