nginxUbuntu安装Nginx和正确卸载Nginx Nginx相关 与Nginx报错：nginx: [error] invalid PID number "" in "/run/nginx.pid" 解决方法

https://www.cnblogs.com/zhaoyingjie/p/6840616.html

https://blog.csdn.net/adley_app/article/details/79223221

https://blog.csdn.net/achang21/article/details/80039561