This skill automates Nginx troubleshooting by parsing error logs and access logs to identify recurring issues and their root causes. It processes logs using GoAccess for real-time statistical analysis, generating reports on error rate trends, upstream timeout patterns, and client error distributions. For 502 Bad Gateway errors, it checks upstream server health, FastCGI/proxy_pass configurations, and backend service status via systemctl. For 504 Gateway Timeouts, it analyzes proxy_read_timeout and fastcgi_read_timeout settings against actual response times. The skill validates configuration changes with nginx -t before applying them, and uses nginx -T to dump the full effective configuration for analysis. It integrates with fail2ban log parsing to correlate security events with error spikes. The analyzer generates remediation scripts that adjust buffer sizes, timeout values, worker_connections, and rate limiting rules, with before/after configuration diffs for review.