./bin/solr create -c コア名
/solr/コア名/core.properties があれば、それをコアとみなす。
/server/solr/README.txt
* Core Discovery *
During startup, Solr will scan sub-directories of Solr home looking for
a specific file named core.properties. If core.properties is found in a
sub-directory (at any depth), Solr will initialize a core using the properties
defined in core.properties. For an example of core.properties, please see:
example/solr/collection1/core.properties
For more information about core discovery, please see:
https://lucene.apache.org/solr/guide/defining-core-properties.html