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The error message you're encountering indicates that there's a permissions issue when trying to access the file "/var/lib/nginx/tmp/fastcgi/2/02/0000000022" while reading from an upstream server in Nginx. The error code 13 corresponds to "Permission denied," which means that the process does not have the necessary permissions to read the file. Here are some steps you can take to troubleshoot and resolve the issue: 1. Verify ownership and permissions: Check if the file or directory is owned by the correct user and group. In this case, it's likely that the Nginx user should have read access. You can use the `ls -l` command to see the permissions. If necessary, adjust them using `chown` or `chmod` commands. ``` sudo ls -l /var/lib/nginx/tmp/fastcgi/2/02/0000000022 sudo chown nginx:nginx /var/lib/nginx/tmp/fastcgi/2/02/0000000022 sudo chmod 644 /var/lib/nginx/tmp/fastcgi/2/02/0000000022 ``` 2. Check if the directory structure is correct: Make sure the path to the file is correct, and that all parent directories have the appropriate permissions for Nginx to access. 3. Restart Nginx: After making changes to ownership or permissions, restart Nginx for the changes to take effect: ``` sudo service nginx restart ``` 4. Check Nginx error logs: Look for more detailed error messages in the `/var/log/nginx/error.log` file. These might provide additional context on why the permission denied error occurred. 5. Use a different location: If the file is not intended to be accessible by Nginx, you may need to configure Nginx to serve a different location or set up a reverse proxy to another server that has access to the file. If the issue persists after trying these steps, please provide more details about your system configuration and any recent changes made to your Nginx setup, so we can better assist you. [2024-07-05 14:53:34 | AI写代码神器 | 467点数解答]