Github
Verifying your primary email address ensures strengthened security and allows GitHub staff to better assist you if you forget your password.
Goto Emails panel in profile settings, check your emails or add && verify your email addresses. It's required by GPG verification.
Adding GPG key to Github account
To enable you sign commits and tags with GPG, you'd add your GPG public key into your account settings. If there are not any existing GPG keys, follow the instruction in Credentials: GPG section. You'd ensure the email address for this GPG keypair is the verified email address at GitHub.
Once your GPG keys get prepared, copy the contents of your GPG public key to your clipboard:
gpg --armor --export <user-id | key-id | fingerprint> | pbcopy
Then, login Github and goto SSH and GPG Keys panel in profile settings. Paste && submit your public GPG key to Github, save the configuration.
Adding SSH key to GitHub account
To enable you access your GitHub repository without passphrase, you'd add your SSH public key into your account settings.
First, make sure your SSH pub/secret keys are generated, just run ls ~/.ssh. If there are not any existing SSH keys, follow the instruction in Credentials/SSH section. After your SSH keys get ready, copy the contents of the id_rsa.pub file to your clipboard:
pbcopy < ~/.ssh/id_rsa.pub
Then, login Github and goto SSH and GPG Keys panel in profile settings. Paste && submit your public SSH key to Github, save the configuration and test it:
ssh -T [email protected]
You will meet the SSH key's fingerprint confirmation when you access through SSH at first time. The published officail fingerprint are:
# GitHub's public key fingerprints (in hexadecimal format):
16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48 (RSA)
ad:1c:08:a4:40:e3:6f:9c:f5:66:26:5d:4b:33:5d:8c (DSA)
# SHA256 hashes shown in OpenSSH 6.8 and newer (in base64 format):
nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8 (RSA)
br9IjFspm1vxR3iA35FWE+4VTyz1hYVLIE2t1/CeyWQ (DSA)
After this, we expect a bonjour message is printed out at every time you access GitHub by SSH.
Note: If you're switching from HTTPS to SSH, you'll need to update your remote repository URLs.