nginx: [error] invalid PID number
nginx重启报错：
nginx: [error] invalid PID number "" in "/var/run/nginx/nginx.pid"
![nginx: [error] invalid PID number](https://cdn.ancii.com/article/image/v1/Qj/zb/RO/ORzjbQVFJasX5aR2DaTg2_Zx5KSH75KdTtVIpx5BAiYTqOw0KXOzqNM7hYPZnlupTUbARu_Qd1q1mPh-rExeCLHoFgT0eMlbhSoq7saIAaY.jpg "nginx: [error] invalid PID number")
解决：
- 查看 /etc/nginx/nginx.conf，并测试下：
nginx -t - 发现没错啊，索性kill掉当前的nginx进程
![nginx: [error] invalid PID number](https://cdn.ancii.com/article/image/v1/Qj/zb/RO/ORzjbQVFJasX5aR2DaTg2_Zx5KSH75KdTtVIpx5BAiaqtpc8cd9L7wgstHLeNK2pXDRbdWvhp5rHHR4828d7GShW4fh0o0G2rpZ9R82Tzcw.jpg "nginx: [error] invalid PID number")
- 执行下：
nginx -c /etc/nginx/nginx.conf nginx -s reload成功执行
![nginx: [error] invalid PID number](https://cdn.ancii.com/article/image/v1/Qj/zb/RO/ORzjbQVFJasX5aR2DaTg2_Zx5KSH75KdTtVIpx5BAiYcowWxbtYqEe3E306bvdOz_nRKmDJLmrV61msDfZJnHDE2KEpAmHW1tL0cfROTr_k.jpg "nginx: [error] invalid PID number")
nginx重启报错：
nginx: [error] invalid PID number "" in "/var/run/nginx/nginx.pid"
解决：
nginx -t
nginx -c /etc/nginx/nginx.confnginx -s reload 成功执行