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. If you see an existing public and private key pair listed (for example idrsa.pub and idrsa) that you would like to use to connect to GitHub, you can add your SSH key to the ssh-agent. Aug 02, 2017 In this Linux/Mac terminal tutorial, we will be learning how to configure ssh keys so that we can login to our servers without a password. Not only is this more convenient, but it is also more secure. Aug 02, 2017 In this Linux/Mac terminal tutorial, we will be learning how to configure ssh keys so that we can login to our servers without a password. Not only is this more convenient, but it is also more secure. Generate and Add SSH Keys. Understand how to generate SSH keys to configure Git, SFTP, or Drupal Drush. Generate SSH Key. Open your terminal and enter the following command to generate a key. Linux and Mac users can catthe file to the terminal and copy the output. Creating an SSH key on Linux & macOS 1. Check for existing SSH keys. You should check for existing SSH keys on your local computer. You can use an existing SSH key with Bitbucket Server if you want, in which case you can go straight to either SSH user keys for personal use or SSH access keys for system use. Open a terminal and run the following.
You will use the Terminal application on Mac OS X to generate an SSH key which will allow you to login to your server without manually entering a password, while giving you a higher level of security that comes from using key pairs.
Mac OS X Terminal
The terminal provides you with a text-based command line interface to the Unix shell component of Mac OS X. In order to get started with it, follow these steps:
- Open your Finder and select “Utilities” from the “Go” menu bar.
- Find the Terminal application in the list of utilities.
- Double-click the Terminal application to start it.
Once you’ve launched the terminal, you’ll see a screen with a prompt that contains your username as well as the name of your machine.
Create a key pair. To create a key pair, at a command prompt, type the following command: sn –k In this command, file name is the name of the output file containing the key pair. The following example creates a key pair called sgKey.snk. Sn -k sgKey.snk. Generate key pair from public key. Click Generate to generate a public/private key pair. As the key is being generated, move the mouse around the blank area as directed. (Optional) Enter a passphrase for the private key in the Key passphrase box and reenter it in the Confirm passphrase box.
Generating an SSH key
An SSH key consists of a pair of files. One is the private key, which you should never give to anyone. The other is the public key. You will need a public key to log into cloud servers you provision. When you generate your keys, you will use
ssh-keygen
to store the keys in a safe location so you can bypass the login prompt when connecting to your server.To generate SSH keys in Mac OS X, follow these steps:
- Enter the following command in the Terminal window. This starts the key generation process. When you execute this command, the
ssh-keygen
utility prompts you to indicate where to store the key. - Press the ENTER key to accept the default location. The
ssh-keygen
utility prompts you for a passphrase. - Type in a passphrase. You can also hit the ENTER key to accept the default (no passphrase). However, this is not recommended.
Please note that you will need to enter the passphrase a second time to continue.
After you confirm the passphrase, the system generates the key pair.
Your private key is saved to the
id_rsa
file in the .ssh
directory and is used to verify the public key you use belongs to the same cloud server. It's important to never share your private key with anyone, it is equivalent of your password!Your public key is saved to the
id_rsa.pub
file and it is the key you'll upload to our cloud service. You can save this key to the clipboard by running this:Log in with an SSH private key on Linux and macOS
This article demonstrates how to use a private key to log in to a Linux速server by using a private key with a Terminal session on macOS速. However,you can follow the same process to use a private key when using anyterminal software on Linux.
Note: For information about using Secure Shell (SSH) private keys on Microsoft速 Windows速 operating systems, see Logging in with an SSH Private Key on Windowsand Generate RSA keys with SSH by using PuTTYgen.
Prerequisites
To complete this process, you need the following software applications:
- SSH client software that is installed on your Linux or macOS operating system by default.
- Your favorite text editor. This example uses the vim text editor.
- Your private key. For more information about generating a key on Linux or macOS, see Connect to a server by using SSH on Linux or Mac OS X.
Log in with a private key
- Using a text editor, create a file in which to store your private key. This example uses the file deployment_key.txt.
- To edit the file in vim, type the following command:
- After the editor starts, press i to turn on insert mode.
- Paste your private key, such as the one in the following image, into the file.Be sure to include the BEGIN and END lines.
- To save your changes, press Esc.
- Type :wq to write the file and return to the command line.
- Run the following command to change the file permissions to 600 to secure the key. You can also set them to 400.This step is required:
- Use the key to log in to the SSH client as shown in the following example, which loads the key in file deployment_key.txt, and logs in as user demo to IP 192.237.248.66:
- When you are prompted to confirm the connection, type yes and then press Enter.
- If your SSH key requires a password, enter it when prompted to complete the connection.
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