for Kibana 7.15.x

• cd to the root of your Kibana folder.
• (Recommended) Stop the Kibana instance if it is running.
• For line-visualizer:
  ./bin/kibana-plugin install https://github.com/ctc-oss/kibana-vis/releases/download/7.15/line-visualizer-7.15.0.zip
• For radar-visualizer:
  ./bin/kibana-plugin install https://github.com/ctc-oss/kibana-vis/releases/download/7.15/radar-visualizer-7.15.0.zip
• If the bin folder is missing, use node to run the script instead:
  line-visualizer:
  node scripts/kibana_plugin install https://github.com/ctc-oss/kibana-vis/releases/download/7.15/line-visualizer-7.15.0.zip
  radar-visualizer:
  node scripts/kibana_plugin install https://github.com/ctc-oss/kibana-vis/releases/download/7.15/radar-visualizer-7.15.0.zip
• Then, start your Kibana server.
• Done!

NOTE: While the changelogs for Kibana 8.0 betas don't appear to break the graph plugins, this release hasn't been tested for versions above Kibana 7.15.x.