hiera software package provides Light weight hierarchical data store, 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 hiera
hiera is installed in your system.
Make ensure the hiera package were installed using the commands given below,
$ sudo dpkg-query -l | grep hiera *
You will get with hiera package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Ruby |
| Package | hiera |
| Version | 3.2.0-2 |
| Description | Light weight hierarchical data store |
| Sub Section | Ruby |