Generating a New SSH Key and Adding It to the Ssh-Agent

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 2017/12/19

Generating a new SSH key

Open Terminal.
Paste the text below, substituting in your GitHub email address.
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ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
This creates a new ssh key, using the provided email as a label.
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Generating public/private rsa key pair.
When you’re prompted to “Enter a file in which to save the key,” press Enter. This accepts the default file location.
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Enter a file in which to save the key (/Users/you/.ssh/id_rsa): [Press enter]
At the prompt, type a secure passphrase. For more information, see

“Working with SSH key passphrases”

1 2	Enter passphrase (empty for no passphrase): [Type a passphrase] Enter same passphrase again: [Type passphrase again]

Adding your SSH key to the ssh-agent

Before adding a new SSH key to the ssh-agent to manage your keys, you should have checked for existing SSH keys and generated a new SSH key. When adding your SSH key to the agent, use the default macOS ssh-add command, and not an application installed by macports, homebrew, or some other external source.

Start the ssh-agent in the background.
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eval "$(ssh-agent -s)"
Agent pid 59566
If you’re using macOS Sierra 10.12.2 or later, you will need to modify your ~/.ssh/config file to automatically load keys into the ssh-agent and store passphrases in your keychain.
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Host *
AddKeysToAgent yes
UseKeychain yes
IdentityFile ~/.ssh/id_rsa
Add your SSH private key to the ssh-agent and store your passphrase in the keychain. If you created your key with a different name, or if you are adding an existing key that has a different name, replace id_rsa in the command with the name of your private key file.
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$ ssh-add -K ~/.ssh/id_rsa
Add the SSH key to your GitHub account.

CATALOG

1. Generating a new SSH key
2. Adding your SSH key to the ssh-agent

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