Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Git Clone Timeout in VS Code: Practical Steps
You're trying to clone a repository in VS Code, but the operation times out. This often happe...
Fix 'npm permission denied' in VS Code Terminal
When you see a 'permission denied' error in the VS Code terminal while running npm comman...
Git Detached HEAD Warning Explained: Causes and Fixes
You see a warning: "You are in 'detached HEAD' state." This happens when you chec...
How to Fix Windows Update Service Not Running
If Windows Update won't start or you see an error like "Windows Update cannot check for u...
Windows 11 Update Stuck at 0%: Practical Checklist
You start a Windows Update and it hangs at 0% for 10, 20, 30 minutes. This is a common frustratio...
Topic paths
Quick titles
Node.js Heap Out of Memory vs Stack Overflow: Key DifferencesFix 'pip install externally managed environment' ErrorHow to Force Cloudflare DNS to UpdateHow to Unstick Windows 11 Installation Assistant at 99%Quick Guide to Node Version Compatibility with npm PackagesBluetooth Support Service Stopped Windows 11Troubleshooting Python Virtual Environment ActivationWindows 11 Assistant Stuck at 99%: Reset and Finish