The second column SpringDataElasticSearch is the version that the pom depends on.
The third column ElasticSearch is the es middleware version installed on linux.
The fifth column SpringBoot is the version that pom depends on.
The SpringBoot version I use is 2.2.6, so I downloaded 6.8.12: https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.8.12.zip