nginx two ways to enable users with permission

nginx gives users permission to launch both methods

Normal users will report an error when restart and reload nginx:

the "user" directive makes sense only if the master process runs with super-user privileges, 
ignored in /opt/nginx/conf/nginx.conf:1

I couldn't give developers root access, so I had to.

The reason: by default, Linux's ports below 1024 are reserved for root users

Method 1:

All users can run it (because of 755 permissions, file owner: root, group owner: root)

chown root:root nginx
chmod 755 nginx

chmod u+s nginx

Method 2:

Only root users and reistlin users can run (because of 750 permissions, file owner: root, group owner: www)

chown root:www nginx

chmod 750 nginx

chmod u+s nginx

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