Git SSH Authentication Error: 'github.com' Host Key Not Known - Troubleshooting Guide - 常规

It seems there's an issue with the SSH authentication for the git user on the remote repository. Here's a breakdown of potential solutions:

Verify Public Key on GitHub: Go to your GitHub account settings > SSH and GPG keys and ensure the public key matches the one on your local machine.
Regenerate SSH Key: If the public key isn't present or is incorrect, follow the guide on GitHub's documentation to regenerate your SSH key and add it to your account: https://docs.github.com/en/github/authenticating-to-github/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent
Check SSH Agent: Use the command ssh-add -l to verify if your SSH key is added to the SSH agent. If it's not, add it with ssh-add <path/to/key>.
Clone via HTTPS: If the above steps don't resolve the issue, try cloning the repository using HTTPS. You'll find the HTTPS URL on the repository's page on GitHub.

Let me know if these steps help you resolve the problem!