JSch jsch = new JSch();

    String user = "otc";
    String host = "p6-m1mp";
    String password = "mypassword"
    int port = 22;

    Session session = jsch.getSession(user, host, port);
    System.out.println("session created.");
    session.setConfig("StrictHostKeyChecking", "no");
    session.setPassword(password);
    session.connect();

    ChannelExec channel=(ChannelExec) session.openChannel("exec");
    BufferedReader in=new BufferedReader(new InputStreamReader(channel.getInputStream()));
    channel.setCommand("su - gosst1 -c "pwd";");
    channel.connect();

    String msg=null;
    List<String> lines = new ArrayList<>();
    while((msg=in.readLine())!=null){
        System.out.println(msg);
        lines.add(msg);
    }

    channel.disconnect();
    session.disconnect();
} catch(Exception e){
    logger.fatal("Remote BTU Process FAILED" + e);
}