Before you generate a GPG key, you can check to see if you have any existing GPG keys.

Supported GPG key algorithms

GitHub supports several GPG key algorithms. If you try to add a key generated with an unsupported algorithm, you may encounter an error.

  • RSA
  • ElGamal
  • DSA
  • ECDH
  • EdDSA, except Ed25519

Note: GPG does not come installed by default on OS X or Windows. To install GPG command line tools, see GnuPG's Download page.

  1. Open TerminalTerminalGit Bash.

  2. Use the gpg --list-secret-keys --keyid-format LONG command to list GPG keys for which you have both a public and private key. A private key is required for signing commits or tags.

    $ gpg --list-secret-keys --keyid-format LONG

    Note: Some GPG installations on Linux may require you to use gpg2 --list-keys --keyid-format LONG to view a list of your existing keys instead. In this case you will also need to configure Git to use gpg2 by running git config --global gpg.program gpg2.

  3. Check the command output to see if you have a GPG key pair.

Further reading