blueproximity software package provides locks/unlocks your desktop tracking a bluetooth device, 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 blueproximity
blueproximity is installed in your system.
Make ensure the blueproximity package were installed using the commands given below,
$ sudo dpkg-query -l | grep blueproximity *
You will get with blueproximity package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | blueproximity |
| Version | 1.2.5-6 |
| Description | locks/unlocks your desktop tracking a bluetooth device |
| Sub Section | admin |