Knowledge base for software setup, errors, and daily tool work.

How to Validate Nginx Configuration Before Reload

Reloading nginx with a broken configuration can take your site down. The safe way is to test the ...

Cloudflare 521 Error: Server Timeout – Causes and Fixes

Cloudflare 521 error indicates the web server is down or unreachable. It appears as “web server i...

Git Merge Conflict: Keep Both Files Instead of One

When you run git merge and get a conflict, Git stops and marks the conflicting files...

Fix npm install Permission Denied on Shared Hosting

Renew an Expired Cloudflare Origin Certificate: Step-by-Step

If your Cloudflare origin certificate has expired, visitors will see SSL errors and your server m...

Fix ERR_CONNECTION_RESET on Specific Websites

ERR_CONNECTION_RESET is a common Chrome error that prevents loading certain websites while others...