Fixing Nginx Upstream Connection Refused and Permission Denied
If you see connect() failed (111: Connection refused) or connect() failed (13:...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
How to Change Git Remote URL with git remote set-url origin
Sometimes you need to change the remote URL of your Git repository — for example, after switching...
How to Fix Git Clone Timed Out and Permission Denied Errors
When you run git clone and see errors like timed out or permissio...
Fix Git SSL Certificate Problem on Windows: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...
VS Code Source Control Not Detecting Changes: Disable Git Fix
If VS Code stops showing file changes in the Source Control panel, Git integration may be stuck o...
Topic paths
Quick titles
Mac Docker Missing Network Troubleshooting GuideResolve Git index.lock Error on WindowsTroubleshooting npm run build Errors on WindowsFix Python UnicodeDecodeError in Socket DataHow to Rebuild Search Index After Windows UpgradeDocker Compose Nginx 502 Gateway Error GuideResolve Docker Pull Access Denied in CI/CDFix Explorer Crashing with System File Checker