title: how to setup custom command for an linux appliance?
body: <p>I want to setup an applicance that will have an custom bash prompt where normal linux command will not run. Instead it will run pre-configured command by us.</p>
  
  <p>E.g On booting up appliance will show</p>
  
  <blockquote>
    <p>help [On typing this command]<br>
    show licence<br>
    show status<br>
    ....</p>
  </blockquote>