Fixing Nginx Upstream Connection Refused and Permission Denied
If you see connect() failed (111: Connection refused) or connect() failed (13:...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix ERR_NAME_NOT_RESOLVED in Chrome with Google DNS
When you see ERR_NAME_NOT_RESOLVED in Chrome, it usually means your computer can...
How to Check if Cloudflare DNS Propagation Is Complete
When you change a DNS record in Cloudflare, propagation doesn't happen instantly. Even with C...
How to Fix Git Push Failed Due to Large File
You try to push a commit to a remote repository, and Git rejects it with an error about file size...
Fix Docker Container Exits Immediately After Start
You run docker run myimage and the container stops almost instantly. This is a commo...
Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Issue queue
SitemapDocker Compose: Loading env vars from file
How to Resolve Docker Build Context Canceled
How to Activate Python venv in Git Bash on Windows
Docker Nginx 502 Bad Gateway: Connection Refused Fix
Practical Solutions for Git Clone Timing Out
Fix VS Code Git Changes Not Showing in Source Control Panel
Fix Cloudflare 522 Error from Plugin Conflicts
NGINX 502 Bad Gateway in Docker: Troubleshooting Guide
Resolve Git Fatal Refusing to Merge Unrelated Histories
Fix Black Screen in Chrome on macOS
Resolve RDP Connection Failed in Windows
Windows Update 0x80070002: System File Checker Repair Guide
How to Resolve Docker Build Context Canceled
How to Activate Python venv in Git Bash on Windows
Docker Nginx 502 Bad Gateway: Connection Refused Fix
Practical Solutions for Git Clone Timing Out
Fix VS Code Git Changes Not Showing in Source Control Panel
Fix Cloudflare 522 Error from Plugin Conflicts
NGINX 502 Bad Gateway in Docker: Troubleshooting Guide
Resolve Git Fatal Refusing to Merge Unrelated Histories
Fix Black Screen in Chrome on macOS
Resolve RDP Connection Failed in Windows
Windows Update 0x80070002: System File Checker Repair Guide