nginxUbuntu Nginx install and uninstall properly associated with Nginx Nginx Nginx error: nginx: [error] invalid PID number "" in "/run/nginx.pid" solution

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