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

How to Resolve Git Merge Conflicts on the Same Line

You run git merge and get a conflict marker on a single line. The file shows both ve...

Fixing Nginx 502 Bad Gateway with Docker and Load Balancers

If you're running Nginx as a reverse proxy or load balancer in a Docker setup, a 502 Bad Gate...

Taskbar Icons Disappeared After Signing Out: Fix Guide

You sign out of Windows, sign back in, and the taskbar icons you pinned are gone—or some system i...

Fix Nginx Permission Denied for Static Files

Common Causes

When Nginx returns a 403 Forbidden or 'permission denied' error for...

Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome

When Chrome shows 'NET::ERR_CERT_AUTHORITY_INVALID', it means the browser cannot verify t...

Fix Cloudflare Error 521 After a Server Update

If you see Cloudflare error 521 after updating your server, the origin web server is refusing the...