$ sudo apt-get update
$ sudo apt-get install jruby-maven-plugins 

jruby-maven-plugins is installed in your system.

Make ensure the jruby-maven-plugins package were installed using the commands given below,

$ sudo dpkg-query -l | grep jruby-maven-plugins *

You will get with jruby-maven-plugins package name, version, architecture and description in a table

jruby-maven-plugins package basic information: