stop elasticsearch node

$ jps | grep Elasticsearch
14542 Elasticsearch

#From the Elasticsearch startup logs:

[2016-07-07 12:26:18,908][INFO ][node                     ] [I8hydUG] version[5.0.0-alpha4], pid[15399], build[3f5b994/2016-06-27T16:23:46.861Z], OS[Mac OS X/10.11.5/x86_64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_92/25.92-b14]

#Or by specifying a location to write a PID file to on startup (-p <path>):

$ ./bin/elasticsearch -p /tmp/elasticsearch-pid -d
$ cat /tmp/elasticsearch-pid && echo
15516
$ kill -SIGTERM 15516