Recall Previous Commands

From Coder Merlin
Within these castle walls be forged Mavens of Computer Science ...
— Merlin, The Coder

Sometimes it's expedient to quickly recall a previous command without the need to re-type it. The most common means of accomplishing this is to use the up-arrow. Let's try it:

john-williams@codermerlin:~$  ls

Now, let's repeat the command, but rather than type ls again, try typing the up-arrow:


Try pressing the and several times.

Observe, Ponder, and Journal: : Section 5
  1. What happens each time you press the ?
  2. What happens each time you press the ?