hplip software package provides HP Linux Printing and Imaging System (HPLIP), 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 hplip
hplip is installed in your system.
Make ensure the hplip package were installed using the commands given below,
$ sudo dpkg-query -l | grep hplip *
You will get with hplip package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | hplip |
| Version | 3.16.10+repack0-1 |
| Description | HP Linux Printing and Imaging System (HPLIP) |
| Sub Section | Utils |