Generate RSA keys with SSH by using PuTTYgen
One effective way of securing SSH access to your cloud server is to usea public-private key pair. This means that a public key is placed onthe server and a private key is placed on your local workstation.Using a key pair makes it impossible for someone to log in by using justa password, as long as you set up SSH to deny password-basedauthentication.
This article provides steps for generating RSA keys by using PuTTYgen onWindows for secure SSH authentication with OpenSSH.
Generate keys
The steps below will walk you through generating an SSH key and adding the public key to the server. Step 1: Check for SSH Keys. First, check for existing SSH keys on your computer. Open Git Bash, Cygwin, or Terminal, etc. And enter: $ ls -al /.ssh # Lists all the files in your.ssh directory, if they exist Generating public/private rsa key pair. From the Public key for pasting into OpenSSH authorizedkeys file field at the top of the window, copy all the text (starting with ssh-rsa) to your clipboard by pressing Ctrl-C. You need this key available on your clipboard to paste either into the public key tool in the Control Panel or directly into the authorized keys on your cloud server. Iddsa나 idrsa라는 파일 이름이 보일 것이고 이에 같은 파일명의.pub 라는 확장자가 붙은 파일이 하나 더 있을 것이다. 그중.pub 파일이 공개키이고 다른 파일은 개인키다. 만약 이 파일들이 없거나.ssh 디렉토리도 없으면 ssh-keygen 이라는 프로그램으로 키를 생성해야 한다. Many Git servers authenticate using SSH public keys. In order to provide a public key, each user in your system must generate one if they don’t already have one. This process is similar across all operating systems. First, you should check to make sure you don’t already have a key.
I use this command on git bash `$ ssh-keygen -t rsa -C '[email protected]'` After that, these line of text show. `'Generating public/private rsa key pair. Enter file in which to save the key (/c/. The default key file name depends on the algorithm, in this case idrsa when using the default RSA algorithm. It could also be, for example, iddsa or idecdsa. Then it asks to enter a passphrase. The passphrase is used for encrypting the key, so that it cannot be used even if someone obtains the private key file.
In Windows, use PuTTYgen to generate your public and private keys.
Git Rsa Key Generation Format 2017
- If needed, download PuTTYgen from the PuTTY download page.(PuTTYgen might have been installed previously with PuTTY or WinSCP.)
- Launch the program, and then click the Generate button.The program generates the keys for you.
- Enter a unique key passphrase in the Key passphrase andConfirm passphrase fields.For additional information about using passphrases,see Log in with a SSH Private Key on Windows.
- Save the public and private keys by clicking the Save public keyand Save private key buttons.
- From the Public key for pasting into OpenSSH authorized_keys filefield at the top of the window, copy all the text (starting with ssh-rsa)to your clipboard by pressing Ctrl-C.You need this key available on your clipboard to paste eitherinto the public key tool in the Control Panel or directly into theauthorized keys on your cloud server.
Use the key pair
You can use the RSA key pair in the following ways.
Specify your SSH key when creating a new cloud server
When you create a cloud server, you can assign a public key from the list of keys.If your key is not already in the list, you may add it, and then assign it.
Add a new public key to the list
- Under Advanced Options on the Create Server page, click Manage SSHKeys.
- Select public key for the cloud server from the SSH Keys listand click Add Public Key.
- Enter the key name, select the region, and paste the entire publickey into the Public Key field. Then click Add Public Key.
- Go back to the Create Server page, and confirm that your key is listedin the SSH Key list.
Assign a public key
- Under Advanced Options on the Create Server page, select the publickey you want to use from the SSH key drop-down menu.
- When you are done specifying the all the other details for the server,click Create Server.
Assign your SSH Key to an existing cloud server
To make use of your newly generated RSA key pair, you must tell PuTTY touse it when connecting to your cloud server.
- To edit the file (or create it), run the following command on the cloud server:
- Paste the text onto its own line in the file.You must have the key available in your clipboard to paste it. The key and itsassociated text (the ssh-rsa identified at the start and the comment at the end)must be on one line in the file. If the text is word-wrapped onto multiple linesan error might occur when connecting.
- If you created the authorized_keys file, change its permissionsafter you’re done editing it by running the following command:
- Open PuTTY, and go to the SSH > Auth section.
- Browse to the location of the key file, and load the private key.
- Go to the Session page, and save the session. This saves the configurationso that PuTTY uses the key every time that you connect to your cloudserver.
After you save your session, your key is loaded automatically when youconnect to your server.
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