發送短信 : Secure access control in unix

  ______     ___      ______   _    _     _____   
 /_   _//   / _ \\   /_   _// | || | ||  /  ___|| 
 `-| |,-   | / \ ||  `-| |,-  | || | || | // __   
   | ||    | \_/ ||    | ||   | \\_/ || | \\_\ || 
   |_||     \___//     |_||    \____//   \____//  
   `-`'     `---`      `-`'     `---`     `---`