That runs it but not in daemon mode and will not be running after reboot. The plugin should be executing this:
Code
/opt/calibre/calibre-server --daemon --with-library=/media/2e168617-f2ae-43fb-b88c-3663af1c8eea/calibre-data --port=8089
It works fine on my multiple test systems. So, I'm not sure why it isn't working on your systems.