title: read output from /dev/ttyUSB0
body: <p>I am newbie in Linux, sorry if the question sounds too easy.</p>
  
  <p>I have some communication with the board.
  what i do first is:
  enable the usb and  gsm driver and cat "/dev/ttyUSB0 &amp;"</p>
  
  <p>afterwards, I send some AT commands and automatically get replies like "OK" and so on.</p>
  
  <p>What I want is to able to READ this output using bash scripts, or any other possible ways</p>
  
  <p>Thx</p>