lab_recho.txt
+--

Download instructor's recho client and server on local machine
 (git pull or browser save as ...) - or use your own

Run them in two terminal windows in on local host
  python recho_server.py (one session)
  python recho_client.py (repeat several session)
Try to start another client in third window before
 the other exits

ssh to your Blue Box VM, run server there, connect
from client on your local machine

run client, server sessions interactively,
experiment with send message size and recv bufsize,
locally and with VM.