import paramiko  def sshclient_execmd(hostname, port, username, password, execmd):   paramiko.util.log_to_file("paramiko.log")      s = paramiko.SSHClient()   s.set_missing_host_key_policy(paramiko.AutoAddPolicy())      s.connect(hostname=hostname, port=port, username=username, password=password)   stdin, stdout, stderr = s.exec_command (execmd)   stdin.write("Y") # Generally speaking, the first connection, need a simple interaction.      print stdout.read()      s.close()          def main():      hostname = '10.***.***.**'   port = 22   username = 'root'   password = '******'   execmd = "free"      sshclient_execmd(hostname, port, username, password, execmd)       if __name__ == "__main__":   main()