Console user interface, character user interface, command-line interface, CLI, shell or simply command-line. In Windows simply press WinKey, type cmd and press Enter. That black box is comman-line. Up until now you can communicate with the computer using text commands. At CODEFUSION we love command-line. It is the most basic art to communicate with the computer that is more and more popular among software developers. Using command-line we are able to communicate with our software tool-set faster and more effectively. Using command-line we are managing the whole projects. We are compiling, testing and running the software. We have access to the deepest layers of the system. This month we will spread our love for command-line at the Opole University of Technology during the Open Lectures we were invited to give. See you there!