Generate Public Key Pair Linux
- Generate Public Key Pair Linux Mac
- Public Key Definition
- Generate Public Key Linux
- Generate Public Key Pair Linux Download
The PuTTYgen program is part of PuTTY, an open source networking client for the Windows platform.
Generate Public Key Pair Linux Mac
- Download and install PuTTY or PuTTYgen.
To download PuTTY or PuTTYgen, go to http://www.putty.org/ and click the You can download PuTTY here link.
- Run the PuTTYgen program.
- Set the Type of key to generate option to SSH-2 RSA.
- In the Number of bits in a generated key box, enter 2048.
- 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.
Note:
While a passphrase is not required, you should specify one as a security measure to protect the private key from unauthorized use. When you specify a passphrase, a user must enter the passphrase every time the private key is used.
- Click Save private key to save the private key to a file. To adhere to file-naming conventions, you should give the private key file an extension of
.ppk
(PuTTY private key).Note:
The.ppk
file extension indicates that the private key is in PuTTY's proprietary format. You must use a key of this format when using PuTTY as your SSH client. It cannot be used with other SSH client tools. Refer to the PuTTY documentation to convert a private key in this format to a different format. - Select all of the characters in the Public key for pasting into OpenSSH authorized_keys file box.
Make sure you select all the characters, not just the ones you can see in the narrow window. If a scroll bar is next to the characters, you aren't seeing all the characters.
- Right-click somewhere in the selected text and select Copy from the menu.
- Open a text editor and paste the characters, just as you copied them. Start at the first character in the text editor, and do not insert any line breaks.
- Save the text file in the same folder where you saved the private key, using the
.pub
extension to indicate that the file contains a public key. - If you or others are going to use an SSH client that requires the OpenSSH format for private keys (such as the
ssh
utility on Linux), export the private key:- On the Conversions menu, choose Export OpenSSH key.
- Save the private key in OpenSSH format in the same folder where you saved the private key in
.ppk
format, using an extension such as.openssh
to indicate the file's content.
To generate an RSA key pair for version 2 of the SSH protocol, follow these steps: Generate an RSA key pair by typing the following at a shell prompt: $ ssh-keygen -t rsa Generating public/private rsa key pair. Aug 07, 2019 Create the ssh key pair using ssh-keygen command. Copy and install the public ssh key using ssh-copy-id command on a Linux or Unix server. Add yourself to sudo or wheel group admin account. Disable the password login for root account. Generate a 2048 bit RSA Key. You can generate a public and private RSA key pair like this. This is how you know that this file is the public key of the pair and not a private key. To check the file from the command line you can use the less command, like this: less public.pem. Creating a private/public key pair on Ubuntu Last updated: 04 Jun 2012. There are many reasons you might want to create a key pair on Linux, more specifically on Ubuntu. For more information about key pairs, see this. If your server is an Amazon EC2 Server Instance, you might want to look at more specific information here.
Generate a key pair with a third-party tool of your choice. Save the public key to a local file. For example, /.ssh/my-key-pair.pub (Linux) or C:keysmy-key-pair.pub. Save the private key to a different local file that has the.pem extension. Connecting clients are required to use a private key that has a public key registered on the server. For more on security, review Linux server security best practices. Use the following steps to generate an SSH key pair: Run the following command using your email address as a label.
Several tools exist to generate SSH public/private key pairs. The following sections show how to generate an SSH key pair on UNIX, UNIX-like and Windows platforms.
Public Key Definition
Generating an SSH Key Pair on UNIX and UNIX-Like Platforms Using the ssh-keygen Utility
UNIX and UNIX-like platforms (including Solaris and Linux) include the ssh-keygen utility to generate SSH key pairs.
Generate Public Key Linux
- Navigate to your home directory:
- Run the ssh-keygen utility, providing as
filename
your choice of file name for the private key:The ssh-keygen utility prompts you for a passphrase for the private key.
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- Enter a passphrase for the private key, or press Enter to create a private key without a passphrase:
Note:
While a passphrase is not required, you should specify one as a security measure to protect the private key from unauthorized use. When you specify a passphrase, a user must enter the passphrase every time the private key is used.
The ssh-keygen utility prompts you to enter the passphrase again.
- Enter the passphrase again, or press Enter again to continue creating a private key without a passphrase:
- The ssh-keygen utility displays a message indicating that the private key has been saved as
filename
and the public key has been saved asfilename
.pub
. It also displays information about the key fingerprint and randomart image.
Generating an SSH Key Pair on Windows Using the PuTTYgen Program
The PuTTYgen program is part of PuTTY, an open source networking client for the Windows platform.
Generate Public Key Pair Linux Download
- Download and install PuTTY or PuTTYgen.
To download PuTTY or PuTTYgen, go to http://www.putty.org/ and click the You can download PuTTY here link.
- Run the PuTTYgen program.
- Set the Type of key to generate option to SSH-2 RSA.
- In the Number of bits in a generated key box, enter 2048.
- 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.
Note:
While a passphrase is not required, you should specify one as a security measure to protect the private key from unauthorized use. When you specify a passphrase, a user must enter the passphrase every time the private key is used.
- Click Save private key to save the private key to a file. To adhere to file-naming conventions, you should give the private key file an extension of
.ppk
(PuTTY private key).Note:
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The.ppk
file extension indicates that the private key is in PuTTY's proprietary format. You must use a key of this format when using PuTTY as your SSH client. It cannot be used with other SSH client tools. Refer to the PuTTY documentation to convert a private key in this format to a different format. - Select all of the characters in the Public key for pasting into OpenSSH authorized_keys file box.
Make sure you select all the characters, not just the ones you can see in the narrow window. If a scroll bar is next to the characters, you aren't seeing all the characters.
- Right-click somewhere in the selected text and select Copy from the menu.
- Open a text editor and paste the characters, just as you copied them. Start at the first character in the text editor, and do not insert any line breaks.
- Save the text file in the same folder where you saved the private key, using the
.pub
extension to indicate that the file contains a public key. - If you or others are going to use an SSH client that requires the OpenSSH format for private keys (such as the
ssh
utility on Linux), export the private key:- On the Conversions menu, choose Export OpenSSH key.
- Save the private key in OpenSSH format in the same folder where you saved the private key in
.ppk
format, using an extension such as.openssh
to indicate the file's content.