How to troubleshoot an error in Nginx server?
1. Check the configuration for syntax errors or warnings: In case there are any issues, the output will specify the file and line number on which it occurred: Nginx also provides a -t switch to test the configuration files if the service command is not available on your system:
What should the buffer size be for Nginx?
If you process a lot of large POST requests (larger than the default 8/16KB) you will benefit from configuring the client_body_buffer_size directive as they will otherwise be written to a temporary file on disk: Remember to reload / restart both Nginx and your PHP backend as well. 7.
How to restart WordPress-Nginx serves.php files instead?
Follow step by step this document on Digital Ocean. Open the /etc/nginx/conf.d/default.conf (by default I don’t have sites-enabled nor sites-available, you can edit accordingly). Restart Nginx and PHP services sudo systemctl restart php-fpm and sudo systemctl restart nginx.
How to check if Nginx is listening on ports?
To check if Nginx is listening for connections on the configured ports you can use the ss or lsof commands: Check the default ports 80 and 443 using lsof: 4. Is Nginx working? Once we have confirmed Nginx is listening on the configured ports, we then need to check if it is processing requests. The simplest way to do that is by using curl.
What does too many open files mean in Nginx?
If you start seeing the failed (24: Too many open files) message in your logs it means Nginx is hitting the maximum open file descriptor limits (1024 by default) and can’t open new connections. To fix it you can use the worker_rlimit_nofile and worker_connections directives at the top of your /etc/nginx/nginx.conf file:
How to check if Nginx is listening for connections?
To check if Nginx is listening for connections on the configured ports you can use the ss or lsof commands: Check the default ports 80 and 443 using lsof: