gearman software package provides Distributed job queue, 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 gearman
gearman is installed in your system.
Make ensure the gearman package were installed using the commands given below,
$ sudo dpkg-query -l | grep gearman *
You will get with gearman package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | gearman |
| Version | 1.0.6-8 |
| Description | Distributed job queue |
| Sub Section | Miscellaneous |