Working at the command line

The terminal loves structure

The structure of the Johnny.Decimal numbering scheme lets you move to any folder with the minimum number of keystrokes using tab completion.

At each level, you know that there will be no conflicting items.

A GIF, showing me navigating to subfolders in Terminal. At each stage I only need to enter the first part of the JD number then press Tab.
Figure 62.22A. Tab completion in Terminal.

See JDHQ for CLI tools

There's now a whole section of the site dedicated to this. See JDHQ/Command line.