> How to fix the NGINX error “Failed to read PID from file”, quick and easy 以下是有关如何修复错误消息的提示： ``` nginx.service: Failed to read PID from file /run/nginx.pid: Invalid argument 或者 openresty.service: Failed to parse PID from file /run/openresty.pid: Invalid argument ``` 此行为是一个已知错误，由nginx和systemd之间的竞争条件引起。 Systemd期望在nginx有时间创建之前填充PID文件。要修复错误，您必须创建该文件。 **Step 1. 创建目录：**`/etc/systemd/system/nginx.service.d` Create a directory named nginx.service.d in /etc/systemd/system/: ``` mkdir /etc/systemd/system/nginx.service.d ``` **Step 2. Print data to file** ``` printf "[Service]\nExecStartPost=/bin/sleep 0.1\n" > /etc/systemd/system/nginx.service.d/override.conf ``` 确保在其自己的行上输入>之后的字符串，以便printf将其输出写入配置文件： ``` /etc/systemd/system/nginx.service.d/override.conf ``` **Step 3. Reload the daemon** Reload systemd manager configuration: ``` systemctl daemon-reload ``` This will rerun all generators, reload all unit files and recreate the entire systemd dependency tree. **Step 4. Restart NGINX** This line will restart NGINX for you: ``` systemctl restart nginx ``` The error should be fixed now. **An alternative workaround** Another workaround is removing the PIDFile option and adding the line: ``` ExecStopPost=/bin/rm -f /run/nginx.pid ``` https://www.cloudinsidr.com/content/heres-fix-nginx-error-failed-read-pid-file-linux/