$ sudo apt-get update
$ sudo apt-get install gradle-plugin-protobuf 

gradle-plugin-protobuf is installed in your system.

Make ensure the gradle-plugin-protobuf package were installed using the commands given below,

$ sudo dpkg-query -l | grep gradle-plugin-protobuf *

You will get with gradle-plugin-protobuf package name, version, architecture and description in a table

gradle-plugin-protobuf package basic information: