With my current es 5.2 cluster, I set many configs by command line option '-E' syntax,
such as
-Enode.master=false
-Ecluster.name=xxx
-Epath.logs=yyy
-Epath.repo=kkk
-Ebootstrap.memory_locak=true
-Expack.security.enabled=false
...
But in ES 6.x document, I can't find any mention about that option.
https://www.elastic.co/guide/en/elasticsearch/reference/6.0/settings.html
-Econfig=zzz
systax is still supported in ES 6.x?