say Change directory to comedy/slapstick.... i just did "cd comedy", "ls" and then "cd slapstick" "ls" and didn't work
As you want to do the command line course you will have to learn the basic's of unix/or/one-of-its-derivate's
Try it with http://www.tutorialspoint.com/unix/unix-useful-commands.htm
When this course asks you to change to a directory that is two deep, it is usually expecting you to get there in one jump, not two - try that.
thank you so much, that was solution