JarInjector.so
This simple Linux GUI Tool provides its users the ability to inject .jar files into already running jvm hosts.
In order to use it, you first need to know which java process this shared library should attach to.
Running jps -mlv will give you a list of each jvm host alongside with its pid.
You can then go ahead and use any tool of your choice to inject the lib, injector worked well for me.
The prebuilt binary is available on the Releases page.