Putty Generate Ssh Key Command Line
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Creating an SSH Key Pair Using PuTTY Key Generator. Find puttygen.exe in the PuTTY folder on your computer, for example, C:Program Files (x86)PuTTY.Double-click puttygen.exe to open it.; Specify a key type of SSH-2 RSA and a key size of 2048 bits: In the Key menu, confirm that the default value of SSH-2 RSA key is selected.; For the Type of key to generate, accept the default key type of RSA. To generate the public/private key pair, enter this in the Command Prompt: ssh-keygen At the first prompt, “Enter file in which to save the key,” press Enter to save it in the default location.
Is it possible to use Putty Key Generator via command line interface? I cannot find any documentation. Any pointers? Btw, I only want to generate a openssh formatted key pair on a windows machine. PuTTY is the world's most popular free SSH and telnet client. Downloads, tutorials, how-tos, vulnerabilities. Is it possible to use Putty Key Generator via command line interface? I cannot find any documentation. Any pointers? Btw, I only want to generate a openssh formatted key pair on a windows machine. PuTTYgen is used to generate public or private key pair for creating SSH keys. Below is the complete guidance about how to generate RSA key in the Windows operating system: Once you install the PuTTY on your machine, you can easily run PuTTYgen. For the same, go to Windows - Start Menu - All Programs - PuTTY - PuTTYgen.
Introduction
You have seen in previous tutorials how to use PuTTY to connect to your VPS securely and how to create SSH keys with PuTTYgen.
You might have more than one SSH key for a single cloud server, or simply more than one cloud server or Droplet that requires SSH keys to log into. This can make you feel overwhelmed with having to manage, sort out, and link all those keys to their respective servers. That’s why Pageant exists.
Pageant is a PuTTY authentication agent. It holds your private keys in memory so that you can use them whenever you are connecting to a server. It eliminates the need to:
- Explicitly specify the relevant key to each Linux user account, if you use more than one account to log into a server
- Type a key’s passphrase each time you log into your user account; and your keys should be passphrase protected since having an unprotected key is as good as hiding your password under your keyboard!
Prerequisites
Make sure you have these prerequisites.
- Pageant is installed together with the PuTTY suite; if you don’t have it installed, you can download it here
- You should already have at least one SSH key saved on your local computer
Step 1 — Adding Keys to Pageant
Start Pageant from the PuTTY folder: Start-Menu > All Programs > PuTTY > Pageant
Pageant starts by default minimized in the system tray. To begin adding your SSH keys, you should right click on its icon and then the following context menu will show up:
Clicking on Add Key from the menu or View Keys to open up the Pageant Key List window. Here you can view, add, and remove keys:
Tip: You can access the Pageant Key List window directly by double-clicking its icon in the system tray.
Click the Add Key button. This will open the file explorer, where you can choose one or more keys at a time to load. You should select files with the .ppk extension:
Click the Open button to load the keys with Pageant.
If a key is passphrase-protected, you will be prompted to enter the passphrase only once before it can be added to the Pageant Key List:
After successfully adding a key, you can now see it listed:
Step 2 — Connecting to the Server(s)
Now these keys will be available while connecting to any server during your PuTTY sessions. You don’t have to take any extra steps in PuTTY. Just enter your hostname or IP address, and SSH user. PuTTY will automatically try to authenticate using any keys currently loaded in Pageant.
Step 3 (Optional) — Removing Keys from Pageant
If you want to remove a key from Pageant, select that key from the Pageant Key List window and press the Remove Key button. You can also remove multiple keys together by selecting them with CTRL or SHIFT.
Tips & Tricks
Use these tips to automate your authenticated connections with Pageant.
Loading Keys Automatically on Pageant Startup
You can make Pageant automatically load one or more private keys when it starts up, instead of adding them manually every time you start up Pageant.
Go to the Pageant shortcut icon from the Windows Start Menu or your desktop.
Right click on the icon, and click on Properties.
A new window will open containing the shortcut’s properties:
From the Shortcut tab, edit the Target field. Leave the path to pageant.exe intact. After that path, add paths to your .ppk key files. These should be outside the quotation marks. Windows 8 ultimate product key generator. Here’s an example:
Click the Apply and then OK buttons.
Note: If the keys are encrypted, Pageant will request the passphrases on startup.
Making Pageant Run PuTTY
You can make Pageant start PuTTY or any other program once it has initialized itself and loaded any keys specified on its command line. That way you can just start Pageant instead of having to start both programs.
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You can achieve this by following the same steps we used previously to add the keys automatically (see the previous section). Just add the program’s path at the end of the command in the Target field, preceded by the -c option, and contained within double quotes. Here’s an example of the full line for the Target field:
Other PuTTY Suite Products
Here are a few other helpful applications that can work with PuTTY.
- PuTTYgen: A tool to generate and edit SSH public and private key pairs. It is part of the PuTTY suite, but it can also operate with the private key formats used by some other SSH clients like WinSCP
- PSFTP: An interactive text-based client for the SSH-based SFTP (secure file transfer) protocol, that allows you to run an interactive file transfer session and perform many thing like listing the contents of directories, browsing around the file system, issuing multiple get and put commands, etc.
- PSCP (PuTTY Secure Copy Client): A tool for transferring files securely between computers using an SSH connection
An SSH key is a form of authentication in the SSH protocol. It is similar to a password, but allows for authentication without entering in a password or any manual input. SSH keys generally speaking are more secure, and convenient than password authentication.
Command Line
If you currently have access to SSH on your server, you can generate SSH keys on the command line using the ssh-keygen utility which is installed by default on our servers. Run it on your server with no options, or arguments to generate a 2048-bit RSA key pair (which is plenty secure).
You will be prompted to select a file for the key pair. The default directory for SSH keys is ~/.ssh with the private key named id_rsa and the public key named id_rsa.pub. By using the default file names, the SSH client will be able to automatically locate the keys during authentication so it is strongly recommended to not change them. You can use the default by pressing the Enter key.
If /home/USER/.ssh/id_rsa or a key of the name you chose already exists, you will be prompted to overwrite the keys. If you do overwrite the existing keys, you will not be able to use them to authenticate anymore.
After you have selected the file for the key pair, you be will be prompted to enter a passphrase to encrypt private key file. Encrypting the private key with a passphrase is optional, but it will improve security the keys. If you enter a passphrase you will have to provide each it time you use the key. You can press the Enter key to not use a passphrase; we strongly recommend the use of a passphrase with SSH keys.
A public and private key will now be generated.
WHM
You can generate SSH key pairs for root in WHM >> Home Security Center >> Manage root's SSH Keys.
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Click Generate a New Key to get started.
There are several fields on this page: Key Name, Key Password, Key Type, and Key Size.
The default Key Name is id_rsa. Keys are generated in /root/.ssh/ so the default key name would create a private key in /root/.ssh/id_rsa, and a public key in /root/.ssh/id_rsa.pub. Using the default name will allow SSH clients to automatically locate the keys so it is strongly recommend you use the default name (simply leave the field blank or fill it with id_rsa).
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The Key Password encrypts the private key file using a password to add an extra layer of security. The password must be provided each time the key is used for authentication to decrypt the private key. The Password Strength field indicates how strong your password is. 0 indicates a very weak password, and 100 indicates a very strong password. Click Password Generator to have a strong password generated for you.
Key Type and Key Size are RSA and 2048 by default, and are secure enough for most purposes so these can be left alone.
Click Generate Key to generate the SSH key pair. WHM will then display the location of the key.
PuTTY
PuTTY is an open Windows SSH client. You will need to have the PuTTYgen utility installed to generate an SSH key pair. PuTTYgen is included in Windows installer on the Download PuTTY site, but you can download it separately if you installed PuTTY without its extra utilities. See Connect using Putty to a Linux Server to learn more about PuTTY.
Open PuTTYgen.
The Parameters at the bottom can be adjusted to affect how secure the key is, but the default options are plenty secure for most purposes.
If you're satisfied with the parameters, click Generate in Actions to generate the key pair.
You may be asked to 'generate some randomness by moving the mouse over the blank area' to generate the key. The randomness is used to generate your keys securely, and make it difficult to reproduce them.
Once the key is generated, you will see the public key in PuTTYgen.
The Key passphrase field sets a password used to decrypt the private the key. This field is optional, and the private key will not be encrypted if it is omitted.Using a passphrase increases the security of your SSH keys, and we strongly recommend setting one.
Be sure to save both the public and private keys on your local machine so they can be used by PuTTY for authentication in the future by clicking the Save public key and Save private key buttons.
If you don't use a passphrase, it will prompt you to confirm before allowing you to save the private key. The private key will be saved as a .ppk file. The public key isn't given an extension by default, but .pub is a common extension for public key files. It can be saved as a .txt file as well as the public key file only stores the public key in plain text.
Command Line
If you currently have access to SSH on your server, you can upload the key over the command line.
Retrieve the contents of the public key. If the key was created in the default location, this can be done by outputting the contents of ~/.ssh/id_rsa.pub.
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The output will look similar to the following:
Putty Generate Ssh Key Command Line Free
Open the (and create if it doesn't exist) ~/.ssh/authorized_keys file using a text editor such as nano, pico, or vim.
If you had to create the ~/.ssh/ directory, or the authorized_keys file, you need to verify the permissions are correct, or you won't be able to login.
Paste the public key at the bottom of the file, and then save and close the file.
Alternatively, you can append the public key to ~/.ssh/authorized_keys with a single command.
You can use the cat command if the public key is stored in a file.
If the public key is not stored as a file on the server, you can use the echo command.
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Be sure to include the entire public key in quotes after echo.
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Once the public key is added to the authorized_keys file, you should be able to login using your SSH keys.
WHM
You can import an existing SSH key for root in WHM >> Home Security Center >> Manage root's SSH Keys.
Click Import Key.
The next page has a few fields to fill in.
You need to name the SSH key in the Choose a name for this key field. The default key name is id_rsa. Using the default name will allow SSH clients to automatically locate the keys so it is strongly recommend you use the default name (simply leave the field blank or fill it with id_rsa).
If you are importing a PPK (PuTTYgen key) file, enter its password (if applicable) in the Private key passphrase text box.
Paste the public key into the appropriate box, but do not paste the private key into the box; private keys should always remain on the servers that generated them.
Click Import.
WHM will display the name of the keys imported, and you should now be able to authenticate over SSH using the key.
The default name for SSH key pairs is id_rsa, and that name will allow an SSH client to locate the key automatically. When an SSH key pair doesn't use the default name, you will need to specify the name of key used.