Lab 12

1. Using the file test commands write a script that will tell you if a file entered on the comand is a directory or file. Give an error messge if the file does not exist
2. Examples:

   $ ./s4 s4
   s4 is a file
   $ ./s4 s5
   Error
   $ ./s4 .
   . is a directory
   

3. email me both the script and some samples of running.