NGINX & OpenResty

Hi all,

I have been helping my friend to set up a new server which is the same configuration with the old server. I login to the older server then type the command "nginx -v" Then the output is "nginx version: openresty/1.11.2.2".

It's a bit strange because if you install nginx only, the ouput will show "nginx version: nginx/1.11.2.2". Or if you install OpenResty, the command should be "resty -v" then output will show "nginx version: openresty/1.11.2.2".

I'm a bit curious because how can they configure/install nginx/openresty then use command "nginx -v "to show output like "nginx version: openresty/1.11.2.2".

Please advise.
Thanks.