Generating a new SSH key and adding it to the ssh-agent

About SSH key generation

If you don't already have an SSH key, you must generate a new SSH key to use for authentication. If you're unsure whether you already have an SSH key, you can check for existing keys. For more information, see "Checking for existing SSH 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.

Generating a new SSH key

Abre la TerminalTerminalGit Bash.
Paste the text below, substituting in your GitHub Enterprise Server email address.
```
$ ssh-keygen -t ed25519 -C "your_email@example.com"
```
Note: If you are using a legacy system that doesn't support the Ed25519 algorithm, use:
```
$ ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
```

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

> Generating public/private algorithm key pair.

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

> Enter a file in which to save the key (/Users/you/.ssh/id_algorithm): [Press enter]

> Enter a file in which to save the key (/c/Users/you/.ssh/id_algorithm):[Press enter]

> Enter a file in which to save the key (/home/you/.ssh/algorithm): [Press enter]

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

> 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.

Inicia el agente SSH en segundo plano.
```
$ eval "$(ssh-agent -s)"
> Agent pid 59566
```
Dependiendo de tu ambiente, puede que necesites utilizar un comando diferente. Por ejemplo, puede que necesites utilizar acceso de raíz ejecutando sudo -s -H antes de iniciar el ssh-agent, o puede que necesites utilizar exec ssh-agent bash o exec ssh-agent zsh para ejecutar el ssh-agent.
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.
- First, check to see if your ~/.ssh/config file exists in the default location.
```
$ open ~/.ssh/config
> The file /Users/you/.ssh/config does not exist.
```
- If the file doesn't exist, create the file.
```
$ touch ~/.ssh/config
```
- Open your ~/.ssh/config file, then modify the file to contain the following lines. If your SSH key file has a different name or path than the example code, modify the filename or path to match your current setup.
```
Host *
  AddKeysToAgent yes
  UseKeychain yes
  IdentityFile ~/.ssh/id_ed25519
```
  Note: If you chose not to add a passphrase to your key, you should omit the UseKeychain line.
  Note: If you see an error like this
```
/Users/USER/.ssh/config: line 16: Bad configuration option: usekeychain
```
  add an additional config line to your Host * section:
```
Host *
  IgnoreUnknown UseKeychain
```
Add your SSH private key to the ssh-agent and store your passphrase in the keychain. Si creaste tu llave con un nombre diferente o si estás agregando una llave existente que tenga un nombre diferente, reemplaza a id_ed25519 en el comando con el nombre de tu archivo de llave privada.
```
$ ssh-add -K ~/.ssh/id_ed25519
```
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 chose not to add a passphrase to your key, run the command without the -K option.

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."

In MacOS Monterey (12.0), the -K and -A flags are deprecated and have been replaced by the --apple-use-keychain and --apple-load-keychain flags, respectively.
Add the SSH key to your account on GitHub Enterprise Server. For more information, see "Adding a new SSH key to your GitHub account."

Si tienes GitHub Desktop instalado, puedes usarlo para clonar repositorios y no manejar claves SSH.

Ensure the ssh-agent is running. You can use the "Auto-launching the ssh-agent" instructions in "Working with SSH key passphrases", or start it manually:
```
# start the ssh-agent in the background
$ eval "$(ssh-agent -s)"
> Agent pid 59566
```
Add your SSH private key to the ssh-agent. Si creaste tu llave con un nombre diferente o si estás agregando una llave existente que tenga un nombre diferente, reemplaza a id_ed25519 en el comando con el nombre de tu archivo de llave privada.
```
$ ssh-add ~/.ssh/id_ed25519
```
Add the SSH key to your account on GitHub Enterprise Server. For more information, see "Adding a new SSH key to your GitHub account."

Inicia el agente SSH en segundo plano.
```
$ eval "$(ssh-agent -s)"
> Agent pid 59566
```
Dependiendo de tu ambiente, puede que necesites utilizar un comando diferente. Por ejemplo, puede que necesites utilizar acceso de raíz ejecutando sudo -s -H antes de iniciar el ssh-agent, o puede que necesites utilizar exec ssh-agent bash o exec ssh-agent zsh para ejecutar el ssh-agent.
Add your SSH private key to the ssh-agent. Si creaste tu llave con un nombre diferente o si estás agregando una llave existente que tenga un nombre diferente, reemplaza a id_ed25519 en el comando con el nombre de tu archivo de llave privada.
```
$ ssh-add ~/.ssh/id_ed25519
```
Add the SSH key to your account on GitHub Enterprise Server. For more information, see "Adding a new SSH key to your GitHub account."

Generating a new SSH key and adding it to the ssh-agent

En este artículo

About SSH key generation

Generating a new SSH key

Adding your SSH key to the ssh-agent

Further reading