Fix Git 'index.lock' File Exists Error in SourceTree
If you use SourceTree and see an error message like fatal: Unable to create 'path/to/.g...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Docker Build Fails: No Space Left on Device
You run docker build and it fails with no space left on device. This is...
Fixing Nginx Permission Denied Due to SELinux Context
You've configured nginx, but when you try to access your site, you see a 403 Forbidden<...
Fix Git 'index.lock file exists' Error
When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....
Fix ERR_CONNECTION_RESET on Chrome for Android
If you see the ERR_CONNECTION_RESET error in Chrome on your Android phone or tab...
How to Stop Windows Explorer from Restarting
If Windows Explorer (explorer.exe) keeps restarting—your taskbar disappears and reappears, or you...
Topic paths
Quick titles
Switching from Cloudflare Origin Certificate to Let's EncryptFix Windows Update Error 0x80070002 on Windows 11Troubleshooting Git Authentication in VS CodeTroubleshooting npm Build ErrorsDocker Container Exits Immediately on Mac: FixesHow to Troubleshoot Docker Network Not FoundDocker Compose Environment Variable Override Not Working: Fixes & ChecksPython MemoryError Large File Fix Checklist