RTFM ^^

http://nginx.org/en/docs/beginners_guide.html#control
http://nginx.org/en/docs/control.html

The command described by the Beginner's Guide are available on the service
file installed by the official package from the nginx.org repository.

Have you even tried out Nginx properly before? That's one of the 1st
question I have about configuration management...
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*B. R.*
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