Cant‘s create logstash service in Centos 6

[Haitianisgood]

ENV:

CentOS release 6.8 (Final) 64bit
logstash 6.4.2

I installed logstash with yum.

I executed service logstash start,but it reported logstash: unrecognized service.

I had executed initctl start logstash but not work as
https://www.elastic.co/guide/en/logstash/6.4/running-logstash.html

so I do /usr/share/logstash/bin/system-install /etc/logstash/startup.options sysv follow
https://discuss.elastic.co/t/although-installing-logstash-i-get-logstash-unrecognized-service/76282
It have create a file /etc/init.d/logstash,but I just receivelogstash started either it did't work( I did't see logstash process when check it ps axu|grep logstash)when I executed service logstash start

[Makra (Makara)]

What is the output of service logstash status ? If it is active/started then create a stream input on TCP port (9999, 9991...) and check if the port is listening using netstat command. Otherwise make logging of logstash to debug mode and dig the log files (/var/log/logstash/logstash-plain.log) for possible errors.

[Haitianisgood]

Thank you for your reply!!!
There is no port listening and no anything log output when change to debug mode!