Follow these simple steps to securely sign your Git commits using your existing SSH keys:

Ensure you have an SSH key already generated:

ls ~/.ssh

Typical filenames are:

• id_ed25519.pub
• id_rsa.pub

If you don't have an SSH key, generate one:

ssh-keygen -t ed25519 -C "your_email@example.com"

Set Git to use SSH for commit signing:

git config --global gpg.format ssh
git config --global user.signingkey ~/.ssh/id_ed25519.pub
git config --global commit.gpgsign true

Replace ~/.ssh/id_ed25519.pub with your actual public key path if different.

Ensure your SSH public key is added to your GitHub account:

• Go to GitHub Settings → SSH and GPG keys.
• Click New SSH Key and paste your public key.
  • Make sure you select "Signing Key" in the "Key Type" dropdown
• Confirm the key is added and marked as "verified."

Make a test commit to confirm everything is working:

git commit -S -m "Test commit using SSH signing"

Push the commit and confirm it is marked as "Verified" on GitHub.

• If your commits aren't showing as verified, ensure the email associated with your SSH key matches your GitHub account.
• Double-check that you've set the correct SSH public key path in Git config.

Now your commits will be securely signed using your SSH keys!