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 notesUnderstanding Git Merge Conflict Markers: A Practical Guide
When you merge branches in Git, you may encounter conflict markers in your files. These markers s...
Docker Compose Port Already Allocated: Checklist
You run docker-compose up and get an error like Error starting userland proxy:...
Fixing Python Requests Connection Timeout Errors
When your Python script using the requests library hangs or raises a ConnectTi...
Fixing Nginx 502 Bad Gateway with Docker and Load Balancers
If you're running Nginx as a reverse proxy or load balancer in a Docker setup, a 502 Bad Gate...
Windows 11 WiFi Has Internet but Other Devices Work Fine
You're connected to WiFi on your Windows 11 PC, but the network icon shows 'No internet&#...
Issue queue
SitemapDocker Compose Env Var Troubleshooting
Fix Windows 11 Update Stuck at 0% with Troubleshooter
Resolve Git Refusing to Merge Unrelated Histories
Fix VS Code Git Authentication Failed: Step-by-Step Guide
Fix Blue Screen Loop After Windows 11 Update
VSCode IntelliSense Lag: How to Fix It
Git Merge Unrelated Histories vs Rebase: When and How to Use Each
Chrome Extensions Configuration Not Loading Fix
Fix Chrome Black Screen After Disabling Hardware Acceleration
Fix Docker Container 'No Space Left on Device' Error
Fixing Python Dependency Conflicts with Incompatible Versions
Windows Update Service Troubleshooting Checklist
Fix Windows 11 Update Stuck at 0% with Troubleshooter
Resolve Git Refusing to Merge Unrelated Histories
Fix VS Code Git Authentication Failed: Step-by-Step Guide
Fix Blue Screen Loop After Windows 11 Update
VSCode IntelliSense Lag: How to Fix It
Git Merge Unrelated Histories vs Rebase: When and How to Use Each
Chrome Extensions Configuration Not Loading Fix
Fix Chrome Black Screen After Disabling Hardware Acceleration
Fix Docker Container 'No Space Left on Device' Error
Fixing Python Dependency Conflicts with Incompatible Versions
Windows Update Service Troubleshooting Checklist