On Fri, Oct 03, 2014 at 08:43:50AM -0400, Ethan Rosenberg wrote: > Dear List - > > I am trying to capture data from a serial port and write it to a file. > > ethan@meow:/var/www$ cat /dev/ttyS0 > scale_value.html > cat: /dev/ttyS0: Device or resource busy > lsof /dev/ttyS0 (tells you what is holding that port open) -dsr-