为什么'sudo nginx-t'和'nginx-t'对同一个文件返回相反的结果？

对于

nginx.conf

，这些命令返回相反的结果-一个失败，另一个成功。为什么?

$ nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: [emerg] open() "/run/nginx.pid" failed (13: Permission denied)
nginx: configuration file /etc/nginx/nginx.conf test failed

$ sudo nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

听起来像是

pid

文件的权限（由指令定义）阻止了普通用户访问它，因此配置测试似乎失败了

nginx: [emerg] open() "/run/nginx.pid" failed (13: Permission denied)