import sys, paramiko, getpass

def sshClient(hostname,port,cmd,username,password):
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    try:
        client.connect(hostname,port=port,username=username, password=password)
        _stdin, _stdout,_stderr = client.exec_command(cmd)
        print(_stdout.read().decode())
    except paramiko.ssh_exception.AuthenticationException:
        print("Erreur d'authenfication !")
    finally:
        client.close()

if __name__ == "__main__":
    try:
        hostname = sys.argv[1]
        port = sys.argv[2]
        cmd = sys.argv[3]
        username = input("Nom d'utilisateur : ")
        password = getpass.getpass()
        sshClient(hostname,port,cmd,username,password)
    except IndexError:
        print(f"{sys.argv[0]} demande des arguments")