title: Using USB to Serial in Ubuntu 12.04 - /dev/ttyUSB0 missing
body: <p>I'm trying to connect a usb-serial adapter to Ubuntu 12.04 (on a VM). For some reason, there is no /dev entry for it.
  I've tried several adapters from different manufacturers - With no success.</p>
  
  <p>Also, I have a 10.04 VM on which I connect the adapter and it appears in /dev/ttyUSB0 immediately</p>
  
  <p>I'm not a very proficient linux user. Do I need to install a driver of some sort?</p>