Using the serial port to login is a good way to get access to a device that doesn't have a network connection. This could be a small embedded Linux computer. More..
Everything that you type plus the result is logged to a text file that you can then use to go back and see what happen. More..
SSL certificates are used within web servers to encrypt the traffic between the server and client, providing extra security for users accessing your application. More..
Linux and all version of unix (including MacOS) have a very rich command line that can be used in many different ways to form very powerful commands. More..