Try Ruby is a interactive shell that quickly and whimsically teaches the Ruby programming language. Originally _why's idea, it has been recreated from the ground up by Rubyists who have a passion for Ruby and for teaching their fellow (wo)man how to program.
File.open("/Home/comics.txt", "a") do |f|
Returns a 500 error. Also:
FileUtils.copy('/comics.txt', '/Home/comics.txt')
Returns nil, but I assume it's supposed to do that since the tutorial moved on.