What actually happens when an AI agent is pointed at a live server: what it can do, where it has to stop and ask, and the failures worth knowing about first.
A deploy failed, the terminal window closed, and the error scrollback is gone. This guide shows immediate recovery steps for Linux and Windows, then how to capture deploy output permanently.
5 min read
A deploy script or CI pipeline can exit 0 while the web server keeps serving old files. Learn how to trace what is actually running, fix silent failure points, and add post-deploy verification on Linux and Windows.
9 min read
A step-by-step guide to diagnosing and fixing IIS 500 errors after editing web.config, using detailed errors, Failed Request Tracing, and logs to pinpoint the broken setting.
7 min read
When nginx returns 413 Request Entity Too Large even though client_max_body_size is set in the server block, a location block is often overriding it. Here's how to find and fix that override.
6 min read
A step-by-step recovery guide for nginx reload failures caused by invalid parameter errors, with inline Linux and Windows commands to find the exact line and reload safely.
6 min read
A step-by-step guide to diagnosing why nginx routes a subdomain to the default server and fixing the fall-through with config verification and safe reload.
7 min read
Duplicate server blocks with the same server_name cause nginx to serve the first matching block and ignore later ones, often without obvious errors. This guide shows how to trace the active configuration, fix the conflict, and prevent it on Linux and Windows.
7 min read
When nginx returns 504 Gateway Timeout for PHP-FPM, the cause is either a timeout shorter than the script's execution time or a genuinely slow script. This guide shows how to isolate the two using upstream response time from nginx logs.
8 min read
Learn how to diagnose and fix docker pull manifest unknown errors by checking image references, tag existence, platform compatibility, and registry authentication.
9 min read
A container that stops immediately with exit code 1 and empty logs usually fails before the app can write anything. Extract the command and environment, replay it in the foreground, and correct the Docker definition on Linux or Windows.
8 min read
A practical, least-invasive fix for docker volume permission denied on bind mounts by aligning container UID/GID with host directory ownership, with Linux and Windows steps.
10 min read
When a Docker Compose service is marked unhealthy but application logs show nothing, the healthcheck itself is the problem. This guide shows how to extract the healthcheck definition, run it manually, and fix the failure on Linux and Windows.
9 min read