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

Bluetooth Not Working After Windows 11 Update? Try These Fixes

After a Windows 11 update, you might find Bluetooth missing, devices not pairing, or intermittent...

Cloudflare DNS Not Updating After Change: Fixes That Work

You change a DNS record in Cloudflare, wait, and the old IP still resolves. This is a common frus...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix 'fatal: refusing to merge unrelated histories' in Git

You cloned a repository, made some commits locally, and now when you try to git pull...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist

How to Fix Nginx Redirect Loop in Server Block

You set up a server block in Nginx, but now the browser keeps redirecting—http to https, or www t...