hershey-font-gnuplot software package provides Hershey vector fonts renderer for gnuplot, 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 hershey-font-gnuplot
hershey-font-gnuplot is installed in your system.
Make ensure the hershey-font-gnuplot package were installed using the commands given below,
$ sudo dpkg-query -l | grep hershey-font-gnuplot *
You will get with hershey-font-gnuplot package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Text Processing |
| Package | hershey-font-gnuplot |
| Version | 0.1-1 |
| Description | Hershey vector fonts renderer for gnuplot |
| Sub Section | Text |