• destroy (3 points): Delete every file in the list of command-line arguments.
• newname (3 points): This program expects two command-line arguments. It will give a "usage" message if it does not receive them. It will change the name of the file given by the first argument to be the name given by the second argument.
• duplicate (3 points): This program also expects two command-line arguments. It will give a "usage" message if it does not receive them. It will make a copy of the file given by the first argument with the name given by the second argument.
• dir (3 points): Prints out all of the names of the files in the current directory. It will not employ any command-line arguments.
• counter (4 points): Prints out the number of words, lines, and characters for each file listed in its command-line arguments. If the first argument begins with a dash, the letters "w", "l", and "c" immediately following the dash indicate which of words, lines, and characters get displayed.
• start (4 points): Prints out the first ten lines of each file listed in the command-line arguments. If the first argument begins with a dash, use the number immediately following the dash instead of ten.

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