You can use unix with windows and a mouse but unix also gives you building blocks that can give you many more choices than any software designer can build into a set of menus. With unix you do not need to worry about backing up your files or making sure you have the most recent version of embl to search. They install new software, check how much space you are using, and in addition they are there to help you with specific problems. Unix will only do something if you tell it to by giving it a command . There may be no options or there may be several acting on the same command.
Some options allow a value, often a filename, to be given following the option.
Again, there is no consistent manner in which this is allowed, with some options requiring the value to be placed immediately following the option letter, while others expecting a space between the option letter and the value. Unix is case-sensitive throughout. The exact combination of upper and lower case letters used in a command, option or filename is important. These common commands involve moving around your account, creating, copying and deleting files and directories. It is a good dea for the novice unix user to keep a list of common commands at hand until you have learnt them.