Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Git Authentication Failed in VS Code on Linux
You're working in VS Code on Linux, try to push or pull, and get a popup: "Git authentica...
Fixing Nginx 502 Bad Gateway in Docker Networks
You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...
Fix Windows 11 Update Stuck at 0% – BITS Service Issues
You click 'Check for updates' in Windows 11, and it sits at 0% for minutes or hours. Ofte...
Fix VS Code Terminal Not Opening Due to Settings
You click the terminal panel icon in VS Code, but nothing happens. The panel doesn't slide up...
Git Merge Unrelated Histories vs Rebase: When and How to Use Each
You've tried to merge two Git branches and got the error: fatal: refusing to merge unre...
Issue queue
SitemapResolve Error 0x800f081f Using System File Checker
Fixing VS Code 'Permission Denied' Errors on All Files
Edge Sync Stopped After Antivirus Update? Here's the Fix
How to Reset Proxy Settings in Windows 11
Troubleshoot Error 0x80070002 with SFC and DISM
IntelliJ Git index.lock Error Fix
How to Fix PermissionError with pip Install
Fix Windows Update Error 0x80070005: Access Denied
Fix err_name_not_resolved Caused by Chrome Extensions
Troubleshooting index.lock File Error in Git Stash
Fix 'port already allocated' for Nginx in Docker Compose
Docker Compose Environment Variable Not Working
Fixing VS Code 'Permission Denied' Errors on All Files
Edge Sync Stopped After Antivirus Update? Here's the Fix
How to Reset Proxy Settings in Windows 11
Troubleshoot Error 0x80070002 with SFC and DISM
IntelliJ Git index.lock Error Fix
How to Fix PermissionError with pip Install
Fix Windows Update Error 0x80070005: Access Denied
Fix err_name_not_resolved Caused by Chrome Extensions
Troubleshooting index.lock File Error in Git Stash
Fix 'port already allocated' for Nginx in Docker Compose
Docker Compose Environment Variable Not Working