Summary

This hour has focused on the UNIX hierarchical file system. You've learned the organization of a hierarchical file system, how UNIX differs from Macintosh and DOS systems, and how UNIX remembers preferences with its hidden dot files. This hour has also explained the difference between relative and absolute filenames, and you've learned about the “.” and “..” directories. You've learned three new commands too: env to list your current environment, cd to change directories, and pwd to find out your present working directory location.