Git Ssh Key Generate Mac

Posted : admin On 11.04.2020

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After you've checked for existing SSH keys, you can generate a new SSH key to use for authentication, then add it to the ssh-agent.

If you don't already have an SSH key, you must generate a new SSH key. If you're unsure whether you already have an SSH key, check for existing keys.

If you don't want to reenter your passphrase every time you use your SSH key, you can add your key to the SSH agent, which manages your SSH keys and remembers your passphrase.

  1. Generating a new SSH key. Open Terminal Terminal Git Bash. Paste the text below, substituting in your GitHub email address. $ ssh-keygen -t rsa -b 4096 -C 'youremail@example.com' This creates a new ssh key, using the provided email as a label. Generating public/private rsa key pair.
  2. Create your SSH keys with the ssh-keygen command from the bash prompt. This command will create a 2048-bit RSA key for use with SSH. This command will create a 2048-bit RSA key for use with SSH. You can give a passphrase for your private key when prompted—this passphrase provides another layer of security for your private key.

Generating a new SSH key

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  1. Open TerminalTerminalGit Bashthe terminal.

  2. Paste the text below, substituting in your GitHub Enterprise email address.

    This creates a new ssh key, using the provided email as a label.

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  3. When you're prompted to 'Enter a file in which to save the key,' press Enter. This accepts the default file location.

  4. At the prompt, type a secure passphrase. For more information, see 'Working with SSH key passphrases'.

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.

  1. Start the ssh-agent in the background.

  2. 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.

  3. 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.

    Note: The -K option is Apple's standard version of ssh-add, which stores the passphrase in your keychain for you when you add an ssh key to the ssh-agent.

    If you don't have Apple's standard version installed, you may receive an error. For more information on resolving this error, see 'Error: ssh-add: illegal option -- K.'

  4. Add the SSH key to your GitHub account.

If you have GitHub Desktop installed, you can use it to clone repositories and not deal with SSH keys. It also comes with the Git Bash tool, which is the preferred way of running git commands on Windows.

  1. Ensure the ssh-agent is running:

    • If you are using the Git Shell that's installed with GitHub Desktop, the ssh-agent should be running.

    • If you are using another terminal prompt, such as Git for Windows, you can use the 'Auto-launching the ssh-agent' instructions in 'Working with SSH key passphrases', or start it manually:

  2. Add your SSH private key to the ssh-agent. 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.

  3. Add the SSH key to your GitHub account.

Ssh Key Generate Mac

  1. Start the ssh-agent in the background.

  2. Add your SSH private key to the ssh-agent. 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.

  3. Add the SSH key to your GitHub account.

Git Ssh Key Generate Mac

  1. Start the ssh-agent in the background.

  2. Add your SSH private key to the ssh-agent. 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.

  3. Add the SSH key to your GitHub account.

Further reading

  • 'About SSH'
  • 'Working with SSH key passphrases'

Source links

Problem

As described in detail on https://openradar.appspot.com/27348363, macOS/OS X till Yosemite used to remember SSH keys added by command ssh-add -K <key>.

Unfortunately this way no longer works. Keys added to the keychain via ssh-add -K are not automatically re-added to the ssh-agent after a reboot. As Apple Developer stated:

'That’s expected. We re-aligned our behavior with the mainstream OpenSSH in this area.'

Macos Generate Ssh Key Git

Solutions

Solution 1 (recommended)

Ssh Key Setup

Apple updated its Technical Notes to indicate that since 10.12.2, macOS includes version 7.3p1 of OpenSSH and its new behaviors.

In ~/.ssh create config file with the following content:

Solution 2

After usage of ssh-add -K <key> (it's recommended to use absolute path of keys) call the command ssh-add -A on every startup of macOS.

Git

To automate this, add a .plist with the following content to the path ~/Library/LaunchAgents/:

Alternatives

  • Create this file with the Lingon app.

  • Use curl to download the .plist file to the stated path:

Notes

Ssh Key Github

If you have issues with ssh-add: illegal option -- K after using the ssh-add -K command, you may use the full path of the command /usr/bin/ssh-add.