#!/bin/bash
# Illustrates command line arguments for a script

# check the number of command line arguments given to this script
if [ $# -ne 2 ]
then
  # Since the no. of arguments is not two, display the command format
  echo Usage:  $0 file1 file2
  exit
else
  # make sure that the first arugment is an existing file
  if [ -e $1 ]
  then
    # copy the first argument file to the second argument file
    cp $1 $2
  else
    echo file $1 is not present
  fi
fi

# for debugging purpose display argument information
echo
echo "Argument values:"
echo Argcount $#
echo $0
echo $1
echo $2