Traceback (most recent call last):
  File "test.py", line 8, in <module>
    tn = telnetlib.Telnet(HOST)
  File "/usr/lib/python2.7/telnetlib.py", line 209, in __init__
    self.open(host, port, timeout)
  File "/usr/lib/python2.7/telnetlib.py", line 225, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "/usr/lib/python2.7/socket.py", line 553, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -2] Name or service not known
root@Arduino:~#