docs: def connect(self):
          """Connect to host
          """
          try:
              self.client.connect(self.host, username=self.username,
                             password=self.password, port=self.port,
                             pkey=self.pkey, timeout=self.timeout)
          except sock_gaierror, ex:
              raise Exception("Unknown host '%s'" % self.host)
          except sock_error, ex:
              raise Exception("Error connecting to host '%s:%s'\n%s" % (self.host, self.port, ex))
          except paramiko.AuthenticationException, ex:
              msg = "Host is '%s:%s'"
              raise Exception("Authentication Error to host '%s'" % self.host)
          except paramiko.SSHException, ex:
              msg = "General SSH error - %s" % ex
              raise Exception(msg)