title: Create ssh key, but provide a passphrase at the command line
body: <p>What is the shell command to generate a SSH key, but provide the passphrase as part of the command instead of standard input for automating this?</p>
  
  <p>For example (pseudo code):</p>
  
  <pre><code>ssh-keygen -f ./id_rsa -t rsa --passphrase=my-secret-here
  </code></pre>
  
  <p>Thanks.</p>