Install the driver
  1.   make<cr>
  2.   make install<cr>
  3.   cp rc.vpty /etc/rc.d/
  4.   add a line to file "/etc/inittab", the line is like below

	vpty::sysinit:/etc/rc.d/rc.vpty
  5.   make node
       in linux 2.6.x
         ./vptymknod26
       other
         ./vptymknod24
