I often say to people "Run the jar file manually and post the output here" and they don't know how to do this. So here is a step by step guide for beginners with examples and explanations so that everyone understands it    First you need to know what a cmd, also called command prompt or command line is. The cmd is this black box where you can put commands in that only hackers use if they want to hack something  Here's a picture of the cmd on Windows: How to open cm