The error "Fatal: Unable to access 'Could not resolve host: GitHub'" typically occurs when Git cannot connect to the GitHub host due to network issues or DNS resolution problems.
To resolve this issue, you can try the following steps:
Check Network Connection: Ensure that your network connection is stable and that you can access other websites and services.
Verify GitHub URL: Double-check that you're using the correct GitHub URL in your Git commands. Ensure there are no typos or misspellings.
DNS Resolution: Verify that your DNS server settings are configured correctly. You can try using a different DNS server or flush the DNS cache on your system.
Firewall or Proxy Settings: If you're behind a firewall or using a proxy, make sure that Git is allowed to access external hosts like GitHub. Adjust your firewall or proxy settings if necessary.
GitHub Status: Check the GitHub Status page to see if there are any ongoing issues or maintenance that could be affecting connectivity.
Restart Git or System: Sometimes, restarting Git or your system can help resolve temporary network issues.
By following these steps, you should be able to resolve the "Unable to access 'Could not resolve host: GitHub'" error and successfully connect to GitHub.