How to do it...

For Linux/macOS users:

1. In a Terminal window, type ssh-keygen and press Enter
2. Enter the name of the file in which to save the public key (or just accept the default value)
3. Enter a passphrase for the new key (not necessary, but recommended)

1. Enter the passphrase a second time for confirmation
2. The program will now generate an RSA public key and save it to the file

For Windows users:

1. Start the puttygen utility.
2. In the Actions section, click on the Generate button to generate a public/private key pair:

1. Move your mouse over the top section of the puttygen dialog box to generate random activity, as per puttygen's instructions.
2. Enter a passphrase (not necessary, but recommended).
3. Click on the Save private key button and specify a filename for the private key (for example, MyPrivateKey.ppk).
4. Highlight the public key that was created in the textbox and save it to a file (for example, MyPublicKey.txt). Do not use the Save public key button because it adds potentially incompatible text to the file.