Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesDocker Container Exits Immediately: Diagnosing Out of Memory
You start a Docker container and it exits within seconds. The logs show nothing obvious, or they ...
How to Fix Windows Update Error 0x800f081f
Error 0x800f081f typically appears when you try to install a Windows update, especially a cumulat...
Fix Windows 11 WiFi Connected but No Internet: IPv4 Settings
You see the WiFi icon connected, but websites won't load. The network shows “No internet” or ...
Fix Git index.lock File Exists Permission Denied Error
You're in the middle of a Git operation and suddenly you see:
fatal: Unable to ...Checklist for Fixing Shared Folder Access in Windows
When you can't access a shared folder on Windows, the problem usually comes down to permissio...
Issue queue
SitemapResolve Permission Error with pip --no-cache-dir
Troubleshoot Chrome Sync Issues Windows 10
VS Code Terminal Permission Error Guide
Docker Compose Ports Not Working? Here's How to Fix
Fix Windows 11 Installation Assistant Stuck at 99% with Clean Boot
How to Open an Elevated Terminal in VS Code
npm install Permission Denied on Shared Hosting Fix
Resolving Nginx Permission Denied Errors (www-data)
Python UnicodeDecodeError: Using ignore to Skip Bad Bytes
How to Avoid Memory Errors in Python with Large Files
Fixing pip Externally-Managed Environment Errors
How to Lower Chrome Memory Consumption
Troubleshoot Chrome Sync Issues Windows 10
VS Code Terminal Permission Error Guide
Docker Compose Ports Not Working? Here's How to Fix
Fix Windows 11 Installation Assistant Stuck at 99% with Clean Boot
How to Open an Elevated Terminal in VS Code
npm install Permission Denied on Shared Hosting Fix
Resolving Nginx Permission Denied Errors (www-data)
Python UnicodeDecodeError: Using ignore to Skip Bad Bytes
How to Avoid Memory Errors in Python with Large Files
Fixing pip Externally-Managed Environment Errors
How to Lower Chrome Memory Consumption