How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesConfigure Git HTTP Timeout to Avoid Clone Failures
If your Git clone or fetch operations time out with errors like fatal: unable to access ...
Fix Docker Container Exits Immediately in Background Mode
You run a Docker container with -d (detached mode) and it exits immediately. The con...
Fix 'Permission Denied' When Running pip install --user
If you see Permission denied when running pip install --user somepackage
Fix 'pip externally managed environment' Permission Denied Error
If you see error: externally-managed-environment when trying to install a Python pac...
How to Fix Cloudflare 521 Error with Wildcard Subdomains
If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...
Issue queue
SitemapFix No Network Access on Windows 11 WiFi
React App Build Fails with Out of Memory Error – Fix
Fix Docker No Space Left on Device Error
Fix VSCode Git Authentication Failure with Bitbucket
Win 11 WiFi Connected But No Internet: IPConfig Release/Renew Fix
How to Fix Windows 11 BSOD After Update with DISM
Troubleshooting Cloudflare DNS Propagation Delays
Resolving Unmerged Paths After Git Rebase Conflict
Docker Build Context Canceled: Checklist and Fixes
Resolve Python Permission Denied on Mac
How to Fix Windows Security Not Starting on Windows 11
How to Fix Git Refusing to Merge Unrelated Histories
React App Build Fails with Out of Memory Error – Fix
Fix Docker No Space Left on Device Error
Fix VSCode Git Authentication Failure with Bitbucket
Win 11 WiFi Connected But No Internet: IPConfig Release/Renew Fix
How to Fix Windows 11 BSOD After Update with DISM
Troubleshooting Cloudflare DNS Propagation Delays
Resolving Unmerged Paths After Git Rebase Conflict
Docker Build Context Canceled: Checklist and Fixes
Resolve Python Permission Denied on Mac
How to Fix Windows Security Not Starting on Windows 11
How to Fix Git Refusing to Merge Unrelated Histories