Follow these steps:
Download the plugin and place it into Artifactory’s plugins directory: /opt/bitnami/artifactory/var/etc/artifactory/plugins.
Restart JFrog Artifactory Open Source.
$ sudo /opt/bitnami/ctlscript.sh restart tomcat
So long as the plugin file name ends in .groovy, JFrog Artifactory Open Source will automatically load it on startup. For a complete list of available plugins, visit the JFrog Github repository.