Thank you for the help. Perhaps that could be added to the Linux FAQ?
Anyway, when I tried the first command I noticed two lines coming and going, one called "serial" and the other ttyUSB0, so I tried the command with 'serial" instead of "dialout." That worked, so now I can access my layout with the Chromebook. WiThrottle doesn't seem to work very well, though, perhaps because the wireless is upstairs and the layout is in the basement? That would seem to be a topic for another post...