title: How to install linux usbserial kernel driver manually?
body: <p>I have a ubuntu 16.04 LTS with kernel 4.4.0-148-generic host machine. I don't have serial dictionary in </p>
  
  <p><code>/lib/modules/4.4.0-148-generic/kernel/drivers/usb</code></p>
  
  <p>So i need to install it manually, but i can't find the source code and build document.</p>
  
  <p>Thanks for your time and hope you can help me out! :)</p>