Fix Nginx Upstream Connection Refused Socket Error
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 'index.lock' Error in VS Code
If you see the error 'fatal: Unable to create 'path/.git/index.lock': File exists'...
Windows Update Service Not Running in Windows 11: Fix It
If Windows Update won't start and you see an error like "Windows Update service is not ru...
Fixing Docker Pull Access Denied Error 403
When you run docker pull and get an error like denied: requested access to the...
Docker Network Not Found But Exists: How to Fix
You run a Docker container and get an error like docker: Error response from daemon: networ...
Fix Git Lock File Not Deleted After Crash
If Git reports a lock file error after a crash, it usually means a previous Git operation was int...
Topic paths
Quick titles
Fix Nginx 13 Permission Denied Error: Step-by-StepPowerShell Venv Activation Not WorkingHow to Enable Remote Desktop on Windows 10How to Fix Nginx 'Upstream Connection Refused' ErrorResolve PowerShell Permission Denied Errors in VS CodeResolve Chrome's Repeated Sign In Prompt for SyncHow to Fix 522 Connection Timeout in NginxWindows Update Service Not Listed in Services.msc