
Troubleshooting
How to Fix Git Detached HEAD and Checkout a Branch
You're working in a Git repository, make some commits, and then realize you're in a '...
Clear technical guides for everyday software errors, configuration problems, and productivity tools.

You're working in a Git repository, make some commits, and then realize you're in a '...

When you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome while running in Safe Mod...

You run git status and see "HEAD detached at" followed by a commit hash. Thi...

When you see upstream connection refused or upstream not found in your ...

When Firefox shows 'Secure Connection Failed' and a message like MOZILLA_PKIX_ERROR_<...

You see "upstream connection refused" in your Nginx error log when proxying requests to p...
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