Hi,
I installed logstash on Ubuntu 14;
sudo apt-cache policy logstash
logstash:
Installed: 1:5.6.2-1
However, I have be following the tutorial by elastic
https://www.elastic.co/guide/en/logstash/current/first-event.html
from which i can run logstash from the command line, but would like to run as service .
service logstash enable logstash: unrecognized service