ps aux|grep nginx
root 352 0.0 0.0 2468624 924 ?? S 10:43上午 0:00.08 nginx: worker process 
root 232 0.0 0.0 2459408 532 ?? S 10:43上午 0:00.02 nginx: master process /usr/local/opt/nginx/bin/nginx -g daemon off; 
root 2345 0.0 0.0 2432772 640 s000 S+ 1:01下午 0:00.00 grep nginx

nginx的路径为：/usr/local/opt/nginx/bin/nginx

使用nginx的 -t 参数进行配置检查，即可知道实际调用的配置文件路径及是否调用有效。

/usr/local/opt/nginx/bin/nginx -t
nginx: the configuration file /usr/local/etc/nginx/nginx.conf syntax is ok
nginx: configuration file /usr/local/etc/nginx/nginx.conf test is successful

测试可知，nginx的配置文件路径为：/usr/local/etc/nginx/nginx.conf 且调用有效。