發送短信 : Secure access control in unix

            ______    _  _      ___      _____   
    ___    /_   _//  | \| ||   / _ \\   /  ___|| 
   /   ||   -| ||-   |  ' ||  | / \ || | // __   
  | [] ||   _| ||_   | .  ||  | \_/ || | \\_\ || 
   \__ ||  /_____//  |_|\_||   \___//   \____//  
    -|_||  `-----`   `-` -`    `---`     `---`   
     `-`