+ varieties of Fedora are available).
+
+ As above, I recommend you also type:
+
+ sudo apt-get rlwrap
+
+ then instead of `mzscheme` (or `racket`) at the command-line, you should type `rlwrap mzscheme`. This gives
+ you a nice history of the commands you've already typed, which you can scroll up and down in with your
+ keyboard arrows.