![]() Reusing a Command Prompt / Terminal Private Keyġ. Follow from Step 7 of Copying the Public Key to the Remote Server to login. For windows this would be C:\Users\username\.ssh and Linux /home/user/.ssh.Ĥ. Insert the USB stick into another computer.ģ. Keep this USB stick safe as it can be used by anyone to gain access to your server.Ģ. ssh folder and copy the PPK file to a USB stick. PuTTY stores the private key as a PPK key and this file is all we need for a machine to connect to a remote server using our public key.ġ. That said, it is relatively easy to reuse a private key across multiple devices. Appending the public key to the authrozied_keys file on the server. Best practice would be to generate a new key pair for each device that wishes to connect. Losing a laptop with the key means that you will need to regenerate your keys. Reusing your private SSH key is possible, but it isn’t the best security practice. If you created a passphrase for your SSH key, you will be prompted for it. Reconnect via SSH to the remote computer. Close the SSH connection by pressing CTRL + D or by typing exit.Ħ. Using the cat command we send the contents to the file, authorized_keys using a pipe that appends the data to the file (>). Copy the contents of the file into a new file in the. ssh Verify that the id_rsa.pub file is present in your home directory. In our example we copied the file to scp id_rsa.pub SSH into the remote computer. You will need to know the IP address or hostname of the remote computer. In a Command Prompt use the scp command to securely copy the id_rsa.pub to your home directory on the remote server. In order to get the public key to our server we need to securely copy (scp) the file across.ġ. The public key is stored on our remote server, and it interacts with the private key on our trusted machine to form a secure connection. Windows CommandĬopying the Public Key to the Remote Server Under Linux it would be /home/les/.ssh cd. Here we assume that you are in your named account. Change directory to the location of your SSH keys. A passphrase is not needed if the SSH connection will be used in an automated script.ĥ. A passphrase is an additional security step for SSH keys that will be used by real users (interactively). When prompted, give your key a passphrase as an extra level of security. ssh in your home directory \home\user\.sshĤ. For example our keys were saved to C:\Users\lespo\.ssh. ![]() This will save the private and public key to the. When prompted to name your key, press Enter. Confirm that your new private key has been saved in the location that you specified.3.For example SSHprivateKey and then click Save. If you didn’t choose a passphrase, confirm that you don’t want one.Ensure that you know this passphrase later, because it's not retrievable. If you want a passphrase, enter it in the Key passphrase field and confirm it.Click Save, close the PuTTY Key Generator window and remember the location of the private key file for future use.Īnother option is to convert the ppk format to an OpenSSH format using the PuTTygen program performing the following steps:.This ensures that you aren't overwriting the original private key. ppk (PuTTY Private Key Files), by entering the. Name the privateKey.ppk file and save as type.An easier way is to use the private key without the ppk format. Note: If you're planning to use the private key with the ppk format for a SOCKS5 proxy connection on Linux, then you must set a passphrase. If you decide to enter a passphrase, then remember it, because you can't access the instance without it. However, having a passphrase makes it complicated to automate, so decide whether or not to add a passphrase in the field. ![]() Note: The warning message suggests that you use a passphrase for extra privacy so no one can access the instance with just the private key.
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