Before you generate an SSH key, you can check to see if you have any existing SSH keys.
  1. Open the command line and enter:
    ls -al ~/.ssh
# Lists the files in your .ssh directory, if they exist
  2. Check the directory listing to see if you already have a public SSH key.
By default, the filenames of the public keys are one of the following:
  • id_dsa.pub
  • id_ecdsa.pub
  • id_ed25519.pub
  • id_rsa.pub
If you see an existing public and private key pair listed (for example id_rsa.pub and id_rsa) that you would like to use to connect to GitHub, you can add your SSH key to the ssh-agent.
If you don't have an existing public and private key pair, or don't wish to use any that are available to connect to GitHub, then generate a new SSH key.
Tip: If you receive an error that ~/.ssh doesn't exist, don't worry! We'll create it when we generate a new SSH key.