Fix Git 'index.lock file exists' Error
When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Fix 'fatal: refusing to merge unrelated histories' in Git
You cloned a repository, made some commits locally, and now when you try to git pull...
How to Fix Cloudflare 521 Error During Setup
If you see a 521 error after setting up Cloudflare, it means your origin server refused the conne...
How to Fix Firefox Secure Connection Failed SSL Errors
When Firefox shows a "Secure Connection Failed" error with an SSL-related message, it mea...
Fix 'pip externally managed environment' Error for venv Setup
When creating a Python virtual environment on newer Linux distributions (e.g., Debian 12, Ubuntu ...
Issue queue
SitemapFix Docker Pull Access Denied for Private Repository
How to Add Python to PATH on Windows 10
How to Stop Docker Container from Exiting on Start
Resolve VS Code Update Permission Errors
Fix ERR_NAME_NOT_RESOLVED in Chrome by Resetting DNS
VSCode Source Control Not Showing Changes Fix
Network Issues Causing Windows 11 Assistant to Hang at 99%
Troubleshoot Cloudflare Wildcard DNS Errors
Fix Windows Update Error 0x800f081f After Update
npm Permission Denied on Lockfile or node_modules After Yarn
Fix Stubborn Git index.lock File Not Deleting
Nginx PHP-FPM Connection Refused: How to Fix
How to Add Python to PATH on Windows 10
How to Stop Docker Container from Exiting on Start
Resolve VS Code Update Permission Errors
Fix ERR_NAME_NOT_RESOLVED in Chrome by Resetting DNS
VSCode Source Control Not Showing Changes Fix
Network Issues Causing Windows 11 Assistant to Hang at 99%
Troubleshoot Cloudflare Wildcard DNS Errors
Fix Windows Update Error 0x800f081f After Update
npm Permission Denied on Lockfile or node_modules After Yarn
Fix Stubborn Git index.lock File Not Deleting
Nginx PHP-FPM Connection Refused: How to Fix