Explainer
Understand Nginx location matching order
Trace exact, prefix, and regex location selection, including the limits of the usual flat-configuration rule.
Explainer
Why Nginx has no sites-available directory
Find the include layout used by your Nginx installation and add site configuration without relying on a distribution-specific convention.
Explainer
Redirect www to non-www, or non-www to www, with Nginx
Choose a canonical hostname, preserve paths and queries, and cover HTTP and HTTPS entry points without creating a redirect loop.
Explainer
Get the correct client IP behind trusted proxies in Nginx
Configure real-IP trust boundaries, understand recursive X-Forwarded-For parsing, and test spoofed headers from untrusted clients.
Explainer
Troubleshoot 504 Gateway Timeout responses from an Nginx proxy
Identify which upstream operation timed out, align request deadlines, and use backend evidence before increasing proxy timeouts.
Explainer
Serve a single-page application with an Nginx HTML fallback
Use try_files for frontend routes while preserving real asset errors, API responses, and predictable caching.
Explainer
Use wildcard and catch-all server names in Nginx
Match subdomains, capture tenant names, and configure a default listener without confusing Nginx wildcards with TLS certificates.
Explainer
Stop Nginx from serving PHP source as a download
Configure the PHP-FPM handler, prevent unintended script execution, and distinguish source exposure from an application-generated download.
Explainer
Troubleshoot “nginx.service failed because the control process exited”
Read the underlying Nginx and systemd errors, then check configuration, port ownership, file access, and service startup options.
Explainer
Diagnose blank PHP pages behind Nginx
Inspect the HTTP response and PHP-FPM logs, verify script paths, and expose errors only in a controlled development environment.
Explainer
Fix Nginx “stat() failed (13: Permission denied)”
Locate the inaccessible directory or security-policy denial, then grant the worker only the access required to serve the file.
Explainer
Read a file line by line in Python
Iterate over a text file with a context manager, preserve meaningful whitespace, and handle encoding and long-line memory limits.