hierarchical directory structure

·                    The root directory has 4 children (3 are directories and 1 is a file).  You can tell the ones that are directories because they also have their own children.  The one named f1 I  am just telling you is a file, from the diagram there is no way to know.

·                    There is one file on the diagram named f1.  Its full name would actually be /f1 since its name is f1, but it is a child of the root.

·                    There is another file on the diagram named f2.  Its full name would be /bin/f2 since its name is f2, but it is a child of bin which is a child of the root.

·                    There are two files both named f4.  This isn't a problem since their full names are different.  One is /bin/dir1/f4 and the other is /usr/f4.

·                    When specifying the whole name, notice the

 slash is used for two different purposes:

• the / at the beginning of the complete name, it indicates the directory known as the root
• when the / is between two words, it acts as a delimiter to show separation between the two parts of the name