http://www.cnblogs.com/xxoome/p/6663993.html
Install the word segmentation plugin
/bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.0.0/elasticsearch-analysis-ik-6.0.0.zip
https://github.com/medcl/elasticsearch-analysis-ik
-su es (switch to es user)
reboot
ps -ef | grep ela
kill -9 pid
./elasticsearch -d