# Some questions from a newbie on Docker Elasticsearch image **URL:** \ **Category:** Elasticsearch\ **Created:** [June 22, 2017, 12:46pm UTC](https://discuss.elastic.co/t/some-questions-from-a-newbie-on-docker-elasticsearch-image/90452 "2017-06-22T12:46:48Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ea1987](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ea1987/32/51356_2.png) [@ea1987](https://discuss.elastic.co/u/ea1987)\ **Post date:** [June 22, 2017, 12:46pm UTC](https://discuss.elastic.co/t/some-questions-from-a-newbie-on-docker-elasticsearch-image/90452/1 "2017-06-22T12:46:48Z")
Hi all, I'm new on both Elasticsearch and Docker and I have some questions about them. I retrieved docker/elastic image via the following command: docker pull [docker.elastic.co/elasticsearch/elasticsearch:5.4.2](http://docker.elastic.co/elasticsearch/elasticsearch:5.4.2) And I started it in this way: docker run -p 9200:9200 -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" [docker.elastic.co/elasticsearch/elasticsearch:5.4.2](http://docker.elastic.co/elasticsearch/elasticsearch:5.4.2) Here are my questions: 1 I know from docker documentation that "docker run" commands is used to run a specific command inside a container. So according to the previous one, what's the unix command? docker run -p 9200:9200 (Publish all exposed ports to random ports) -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" (Set environment variables) [docker.elastic.co/elasticsearch/elasticsearch:5.4.2](http://docker.elastic.co/elasticsearch/elasticsearch:5.4.2) (image name) So where is the command? I suspect it's like elasticsearch starts together with the container. If so, how image's creator did that? 2 What's the best way of running the container without elastic's stdout? 3 I tried to build a custom docker image based on CentOS in which I would like to install elasticsearch like a service (via rpm). Installation works fine but when I try to run elasticsearch.service via systemctl I get the following error: Failed to get D-Bus connection: Operation not permitted How can I solve this? Thanks, Andrea ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 20, 2017, 12:46pm UTC](https://discuss.elastic.co/t/some-questions-from-a-newbie-on-docker-elasticsearch-image/90452/2 "2017-07-20T12:46:51Z")
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