Just a heads up - on the learn bash the hard way section 1.6.2 you tell the user to enter csh but you never tell them to exit, so a beginner following your inst

Just a heads up - on the learn bash the hard way section 1.6.2 you tell the user to enter csh but you never tell them to exit, so a beginner following your instructions would be doing the whole tutorial in csh, not bash. Granted, your comment about $ vs % and the fact that all the following code snippets have $ they could figure it out but still.