Testing your SSH connection

Before testing your SSH connection, you should have already:

• Checked for existing SSH keys
• Generated a new SSH key
• Added a new SSH key to your GitHub account

You'll need to authenticate this action using your password, which is the SSH key passphrase you created earlier. See Working with SSH key passphrases.

1. Open TerminalTerminalGit Bash.

2. Enter the following:

   Shell

   ssh -T git@github.com
   # Attempts to ssh to GitHub
   

   You may see a warning like this:

   > The authenticity of host 'github.com (IP ADDRESS)' can't be established.
   > ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
   > Are you sure you want to continue connecting (yes/no)?
   

3. Verify that the fingerprint in the message you see matches GitHub's public key fingerprint. If it does, then type yes:

   > Hi USERNAME! You've successfully authenticated, but GitHub does not
   > provide shell access.
   

   You may see this error message:

   ...
   Agent admitted failure to sign using the key.
   debug1: No more authentication methods to try.
   Permission denied (publickey).
   

   This is a known problem with certain Linux distributions. For more information, see Error: Agent admitted failure to sign.

   Note

   The remote command should exit with code 1.

4. Verify that the resulting message contains your username. If you receive a "permission denied" message, see Error: Permission denied (publickey).