Anyone who has run a server in the past knows that it never hurts to know enough about command line tools to be dangerous. There are already plenty of sites that can teach you the basics of the command line. SimTerm lets you share your own knowledge with the world.
This plugin is made for tutorial websites. With a simple shortcode, it can show terminal sessions on your website. Simply enter the text you want displayed and the rest is easy. You can even change color and delay settings.