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 notesHow to Fix Chrome Black Screen After Turning Off Hardware Acceleration
If you turned off hardware acceleration in Chrome and now see a black screen, you're not alon...
How to Use Chrome's Built-in Memory Cleanup Tool
If Chrome is eating up your system memory and slowing everything down, you don't need third-p...
Fix Docker Compose 'Port Already Allocated' for MySQL
You run docker compose up and get an error like Error: Port 3306 is already al...
Fix pnpm Permission Denied Errors on macOS
When running pnpm on macOS, you may encounter a EACCES: permission denied error, esp...
Using nvm to Switch Node Version for a Specific Package
You might find that a package fails to install or run because it requires a specific Node.js vers...
Issue queue
SitemapFix NET::ERR_CERT_AUTHORITY_INVALID via Chrome Enterprise Policy
Fix Docker System Prune Not Freeing Enough Space
How to Clean Install Chrome to Fix Status Access Violation
Stuck at 99% Windows 11 Installation Assistant Solution
Troubleshoot ERR_CONNECTION_RESET in Chrome with VPN
Troubleshoot VS Code Git Not Seeing Subfolder Edits
Pip Externally Managed Environment: What It Means and How to Fix
Overcoming 'remote origin already exists' in Git
Node Sass Build Failed: How to Upgrade Node Version
npm package.json Missing: Causes and Solutions
How to Use System Restore After a Windows 11 Blue Screen Update
Fix DNS Probe Finished NXDOMAIN After Windows Update
Fix Docker System Prune Not Freeing Enough Space
How to Clean Install Chrome to Fix Status Access Violation
Stuck at 99% Windows 11 Installation Assistant Solution
Troubleshoot ERR_CONNECTION_RESET in Chrome with VPN
Troubleshoot VS Code Git Not Seeing Subfolder Edits
Pip Externally Managed Environment: What It Means and How to Fix
Overcoming 'remote origin already exists' in Git
Node Sass Build Failed: How to Upgrade Node Version
npm package.json Missing: Causes and Solutions
How to Use System Restore After a Windows 11 Blue Screen Update
Fix DNS Probe Finished NXDOMAIN After Windows Update