"In the first tip of the new millennium, we will discuss the very useful 'tree'
utility. The tree view of a directory structure under Linux and many other
operating systems is a natural one. This type of display can be incredibly
useful for helping someone new learn the directory structure of a project.
It's also very appropriate in a java environment where the directory
structure mirrors the class structure." The story's at LinuxLookup.com. - From an Anonymous Reader
January 3, 2001