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deepmind.google·6d ago
AI Engineering
Lobsters·15d ago·5 min read
GitHub suddenly rejected my SSH key (the fix was a .pub file?!)
TL;DR
GitHub rejected an SSH key unexpectedly, causing a 'Permission denied' error during git pulls. The issue was traced to the absence of a corresponding .pub file for the SSH key.
✦ Why It Matters
Ensure both private and public SSH key files are present to avoid authentication failures with GitHub.
Key Takeaways
- Always generate a .pub file for your SSH private keys.
- Check GitHub's server status if you encounter authentication issues.
- Test SSH connections with and without .pub files to diagnose problems.
- Stay updated on changes to GitHub's authentication processes.
How It Works
OpenSSH uses different authentication flows based on the presence of a .pub file. With a .pub file, the client first probes the server with the public key, while without it, the client sends a fully signed request directly.
This change in flow can affect compatibility with certain servers.