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

Recover Lost Commits After Git Detached HEAD

You've made commits while in a detached HEAD state, and now you can't see them on any bra...

Fix Windows Security App Not Responding: Step-by-Step

You open Windows Security to run a scan or check protection, but the app freezes, shows a blank w...

Fix Nginx Configuration Test Failure in Docker

When you run nginx -t inside a Docker container and get an error, the container usua...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

Fix Docker 'No Space Left on Device' Volume Error

When Docker reports 'no space left on device' for a volume, the symptom is often a contai...

Fixing Nginx 502 Bad Gateway in Docker: Practical Steps

You set up Nginx as a reverse proxy in Docker, but instead of your app you see a 502 Bad Gateway....