I’m using the following SSH method on Android device to send a command to a local server.

protected String sshConnect(String username, String password, String host, int port, long defaultTimeoutSeconds, String command) {
    ClientChannel channel;
    String responseString = null;
    // create a client instance
    try (SshClient client = SshClient.setUpDefaultClient()) {
        client.setForwardingFilter(AcceptAllForwardingFilter.INSTANCE); //?
        client.start();
        Log.d(TAG, "sshConnect(): client.start(): client started");

        // connection and authentication
        try (ClientSession session = client.connect(username, host, port).verify(TimeUnit.SECONDS.toMillis(defaultTimeoutSeconds)).getSession()) {
            Log.d(TAG, "ssh: client.connect()");
            session.addPasswordIdentity(password);
            session.auth().verify(TimeUnit.SECONDS.toMillis(defaultTimeoutSeconds));
            Log.d(TAG, "ssh: connection established");

            // create a channel to communicate
            channel = session.createChannel(Channel.CHANNEL_SHELL);
            Log.d(TAG, "ssh: starting shell");

            ByteArrayOutputStream responseStream = new ByteArrayOutputStream();
            channel.setOut(responseStream);

            // open channel
            channel.open().verify(5, TimeUnit.SECONDS);

            // open channel
            channel.open().verify(5, TimeUnit.SECONDS);
            try (OutputStream pipedIn = channel.getInvertedIn()) {
                pipedIn.write(command.getBytes());
                pipedIn.flush();
            }

            // close channel
            channel.waitFor(EnumSet.of(ClientChannelEvent.CLOSED),
                    TimeUnit.SECONDS.toMillis(5));

            // output after converting to string type
            responseString = responseStream.toString();
            Log.d(TAG, "ssh: responseString == " + responseString);

        } catch (Exception e) {
            Log.d(TAG, "sshConnect(): client.connect(): Exception: " + e);
        }
    } catch (Exception e) {
        Log.d(TAG, "sshConnect(): client.start(): Exception: " + e);
    }
    return responseString;

}

Problem is it seems to be opening a dummy terminal and then return literally double everything in the terminal including the welcome message, the command prompt, the command, the result, and some warning messages about being a “dummy” terminal. Printing out the responseString in the logs, I get..

debian raspbian buster 10 computer
debian raspbian buster 10 computer
touch test.file
'dummy': unknown terminal type.
username@computer:~$ 'dummy': unknown terminal type.
username@computer:~$ touch test.file
username@computer:~$ 

I would like the same behavior as when I ..
sss -p port username@host 'touch test.file' where it doesn’t open a dummy terminal and simply returns the result of the command.