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

Chrome Certificate Error Invalid Authority: Diagnosis Checklist

When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...

Docker Network Not Found After Container Restart: Fixes

You restart a Docker container and get an error like network <name> not found....

Git Detached HEAD Warning Explained: Causes and Fixes

You see a warning: "You are in 'detached HEAD' state." This happens when you chec...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Microsoft Edge Sync Error 0x80070424

You try to sync your Microsoft Edge data—bookmarks, passwords, settings—but get error 0x80070424....