A Project with Paradoxical Goals Unix Files and Directories Unix uses a simple, regular two level file system. The first level is files . The second level is directories .
Directories can contain either files or other directories.
This means that all directories are arranged in a tree. When your account was created, a directory was automatically created for you. This directory is called your home directory . Its name is your login name. When you log into unix, you automatically start in this directory.