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Turn on debug mode in Nginx

To turn on debug mode in Nginx, please update Nginx config file /etc/nginx/conf-enabled/log.conf (Linux/OpenBSD) or /usr/local/etc/nginx/conf-enabled/log.conf (FreeBSD), append string debug in parameter error_log like below:

error_log ... debug;

Then restart Nginx service.

Nginx logs detailed debug info to /var/log/nginx/error.log (Linux/FreeBSD) or /var/www/logs/error.log (OpenBSD).