Linux command shells have a feature call "TAB completion" which can save you lots of time and avoid errors. For example, when typing the following commands, you can just enter
unzip agent and then press the TAB button. If there is only one filename that starts with
agent, the shell will auto-complete the rest of the name. If the name is not auto-completed, press TAB a second time to see the available options and you can enter more character until you get a unique match.