Git Generate Ssh Key Puttygen
title | description | services | documentationcenter | author | manager | editor | tags | ms.assetid | ms.service | ms.workload | ms.tgt_pltfrm | ms.topic | ms.date | ms.author |
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Learn how to generate and use SSH keys on a Windows computer to connect to a Linux virtual machine on Azure. | gwallace | azure-service-management,azure-resource-manager | virtual-machines-linux | vm-linux | 11/26/2018 |
For recommendations, see options for SSH keys. Generating a new SSH key pair. If you want to create: An ED25519 key, read ED25519 SSH keys. An RSA key, read RSA SSH keys. ED25519 SSH keys. The book Practical Cryptography With Go suggests that ED25519 keys are more secure and performant than RSA keys. Oct 12, 2016 Create your SSH keys. TortoiseGIT comes with Puttygen, so let's use it to create your keys: Start TortoiseGIT Puttygen. Once PuTTY Key Generator opens up: (1) Click Generate (2) Copy the Public OpenSSH key (3) Enter a passphrase (remember it - yes, you need a passphrase) (4) Save the Private Key. Notes: The saved Private Key here. How to Generate SSH Keys on PuTTY. SSH keys are one of the most secure SSH authentication options. It is definitely more secure than the usual SSH password authentication. Therefore, it is highly recommended to use SSH Key authentication method for connections to your servers.
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This article describes ways to generate and use secure shell (SSH) keys on a Windows computer to create and connect to a Linux virtual machine (VM) in Azure. To use SSH keys from a Linux or macOS client, see the quick or detailed guidance.
[!INCLUDE virtual-machines-common-ssh-overview]
[!INCLUDE virtual-machines-common-ssh-support]
Windows packages and SSH clients
You connect to and manage Linux VMs in Azure using an SSH client. Computers running Linux or macOS usually have a suite of SSH commands to generate and manage SSH keys and to make SSH connections.
Windows computers do not always have comparable SSH commands installed. Recent versions of Windows 10 provide OpenSSH client commands to create and manage SSH keys and make SSH connections from a command prompt. Recent Windows 10 versions also include the Windows Subsystem for Linux to run and access utilities such as an SSH client natively within a Bash shell.
Other common Windows SSH clients you can install locally are included in the following packages:
You can also use the SSH utilities available in Bash in the Azure Cloud Shell.
- Access Cloud Shell in your web browser at https://shell.azure.com or in the Azure portal.
- Access Cloud Shell as a terminal from within Visual Studio Code by installing the Azure Account extension.
Create an SSH key pair
The following sections describe two options to create an SSH key pair on Windows. You can use a shell command (ssh-keygen
) or a GUI tool (PuTTYgen). Also note, when using Powershell to create a key, upload the public key as ssh.com(SECSH) format. When using CLI, convert the key into OpenSSH format prior to uploading.
Create SSH keys with ssh-keygen
If you run a command shell on Windows that supports SSH client tools (or you use Azure Cloud Shell), create an SSH key pair using the ssh-keygen
command. Type the following command, and answer the prompts. If an SSH key pair exists in the chosen location, those files are overwritten.
For more background and information, see the quick or detailed steps to create SSH keys using ssh-keygen
.
Generate Ssh Key Windows
Create SSH keys with PuTTYgen
If you prefer to use a GUI-based tool to create SSH keys, you can use the PuTTYgen key generator, included with the PuTTY download package.
To create an SSH RSA key pair with PuTTYgen:
Git Generate Ssh Key Puttygen Software
Start PuTTYgen.
Click Generate. By default PuTTYgen generates a 2048-bit SSH-2 RSA key.
Move the mouse around in the blank area to provide randomness for the key.
After the public key is generated, optionally enter and confirm a passphrase. You will be prompted for the passphrase when you authenticate to the VM with your private SSH key. Without a passphrase, if someone obtains your private key, they can sign in to any VM or service that uses that key. We recommend you create a passphrase. However, if you forget the passphrase, there is no way to recover it.
The public key is displayed at the top of the window. You can copy this entire public key and then paste it into the Azure portal or an Azure Resource Manager template when you create a Linux VM. You can also select Save public key to save a copy to your computer:
Optionally, to save the private key in PuTTy private key format (.ppk file), select Save private key. You will need the .ppk file later to use PuTTY to make an SSH connection to the VM.
If you want to save the private key in the OpenSSH format, the private key format used by many SSH clients, select Conversions > Export OpenSSH key.
Provide an SSH public key when deploying a VM
To create a Linux VM that uses SSH keys for authentication, provide your SSH public key when creating the VM using the Azure portal or other methods.
The following example shows how you would copy and paste this public key into the Azure portal when you create a Linux VM. The public key is typically then stored in the ~/.ssh/authorized_key directory on your new VM.
Connect to your VM
One way to make an SSH connection to your Linux VM from Windows is to use an SSH client. This is the preferred method if you have an SSH client installed on your Windows system, or if you use the SSH tools in Bash in Azure Cloud Shell. If you prefer a GUI-based tool, you can connect with PuTTY.
Use an SSH client
With the public key deployed on your Azure VM, and the private key on your local system, SSH to your VM using the IP address or DNS name of your VM. Replace azureuser and myvm.westus.cloudapp.azure.com in the following command with the administrator user name and the fully qualified domain name (or IP address):
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If you configured a passphrase when you created your key pair, enter the passphrase when prompted during the sign-in process.
If the VM is using the just-in-time access policy, you need to request access before you can connect to the VM. For more information about the just-in-time policy, see Manage virtual machine access using the just in time policy.
Connect with PuTTY
If you installed the PuTTY download package and previously generated a PuTTY private key (.ppk) file, you can connect to a Linux VM with PuTTY.
Start PuTTy.
Fill in the host name or IP address of your VM from the Azure portal:
Select the Connection > SSH > Auth category. Browse to and select your PuTTY private key (.ppk file):
Click Open to connect to your VM.
Next steps
For detailed steps, options, and advanced examples of working with SSH keys, see Detailed steps to create SSH key pairs.
You can also use PowerShell in Azure Cloud Shell to generate SSH keys and make SSH connections to Linux VMs. See the PowerShell quickstart.
If you have difficulty using SSH to connect to your Linux VMs, see Troubleshoot SSH connections to an Azure Linux VM.
This How-to will show you a method for generating SSH key pairs on a Windows computer, saving them to a USB flash drive, installing the SSH key on an AREDN® node and using the SSH keys with a PuTTY terminal session.
The use of Secure Shell (SSH) keys when using PuTTY or another SSH client is a useful aid to managing a group of AREDN® nodes.
First, obtain the PuTTY suite of applications from the PuTTY Download Page and install them on your computer.
Second, obtain and prepare to use a text editor such as Notepad++ that does not insert unwanted characters and metadata into a text file.
Next, follow the steps below.
- Start the PuTTYGen application. Confirm that you are going to generate an SSH-2 RSA key.
- Select the Generate button to get the prompt asking you to make some random mouse movements. After a short while you get a message asking you to wait while the keys are generated. It finishes and you now have a new key pair.
- Give the key pair a suitable comment so that you will remember what the keys are used for. Here we just entered testkey@wu2s.com for an example. Whatever you enter in the 'Key Comment' field must look like an email address with no spaces and the '@' present as in callsign@example.com. Also enter a suitable passphrase to use when accessing the private key. Record this passphrase so you will remember it for future use.
- Now copy and save the public key. Open Notepad++ and confirm that the End Of Line (EOL) format is set to UNIX/OSX Format. This will ensure that there are no extraneous characters in the public key file.
- Back in your PuTTYGen window, select and copy (Control-C) the complete text in the boxed labeled “Public key for pasting into OpenSSH authorized keys file”
- Switch back to your Notepad++ window and Paste (Control-V) the public key text you just copied from PuTTYGen.
- From the Notepad++ menu bar, select File -> Save As to save the public key to a suitable location. Many people save their keys on a USB flash drive to maintain physical possession of them at all times. Give the public key file a suitable name. You can exit Notepad++ now since you will not need it again.
- Switch back to the PuTTYGen window again and select the “Save Private Key” button. This will let you save the private key just as you did in the previous step with the public key. You are finished generating and saving your SSH keys. Exit PuTTYGen.
- In order to use your new SSH key pair, login to your AREDN® node and go to the Setup -> Administration screen. At the bottom you will see the Authorized SSH Keys section where you will install the public keys to use on this node.
- When you press the Select File button you see a dialog box which enables you to locate the public SSH key that you want to install.
- After choosing the desired public key file. Select the Upload button to install the key on the AREDN® node.
- After installing the new public key, confirm that it is ready for use by looking in the dropdown list at the Remove Key section. If your SSH key filename appears, then it is installed properly. DO NOT remove it. In the example below there are two SSH keys currently installed on this node.
- To use your SSH keys, open a new PuTTY session. In the Hostname box enter localnode and in the Port box enter 2222. It is helpful to save this session definition as something you will remember. Select the Save button.
Git Generate Ssh Key Putty
14. Now, using the menu at the left, go to the SSH section and then select the Auth item. This shows a number of Options. The only one we need is the very last – the location of the Private key file for authentication. Browse for it and select the correct filename as before. Remember that the PRIVATE key files end in .ppk Go back to top of the menu on the left and select Session.SAVE the session definition again.
- Now you can use the session information you saved by clicking the Load or Open button in the main PuTTY session screen. This will open a terminal session box as shown below. Login to the AREDN® node as root.
- If you configured the PuTTY session correctly, it will find your private key file and ask you for the passphrase. If PuTTY cannot find the private key file, it will revert to prompting you for the root password that you normally use on the node.
- The correct passphrase was entered. The node’s banner appears in the terminal session window and you can now do any command line tasks on the node.