title: ElasticSearch services own logs
body: <p>I Installed ELK (ElasticSearch + Kibana + Logstash) on Ubuntu machines following the steps described in <a href="https://www.digitalocean.com/community/tutorials/how-to-use-logstash-and-kibana-to-centralize-and-visualize-logs-on-ubuntu-14-04" rel="nofollow">https://www.digitalocean.com/community/tutorials/how-to-use-logstash-and-kibana-to-centralize-and-visualize-logs-on-ubuntu-14-04</a> . </p>
  
  <p>All works fine when using /var/log/syslog file as a log source. If I change to another file, no data appear in Kibana interface. I tried to debug the applications but no helpful information was found in:</p>
  
  <p><strong>/var/log/elasticsearch<br>
  /var/log/logstash/logstash.log<br>
  /var/log/syslog</strong></p>
  
  <p>Does anybody know where can I find detailed logging for ElasticSearch, Logstash and Logstash-Forwarder beside previous specified files?</p>
  
  <p>TLDR;
  Where ElasticSearch, Logstash and Logstash-Forwarder output their logs beside /var/log/elasticsearch; /var/log/logstash/logstash.log; /var/log/syslog?</p>