Nodejs ssh2只在一个终端上运行多个命令

我在我的项目中编码ssh2模块时遇到了麻烦。我尝试在一个终端上运行多个命令来统治远程Linux系统。例如，"bc"命令为您提供了一个基本的计算器，您可以运行它进行基本操作。但是，当您使用时，这种进程需要处于唤醒状态(它将接受两个或多个输入，并将作为结果给出响应)。

我需要创建一个系统，如工作与websocket和ssh。当websocket接收到命令时，ssh节点需要执行该消息，模块需要通过websocket.send()发送响应

我使用Node.js websocket,ssh2客户端。

下面是我的代码:

#!/usr/bin/node
var Connection = require('ssh2');
var conn = new Connection();
var command="";
var http = require('http');
var WebSocketServer = require('websocket').server;
var firstcom=true;
conn.on('ready', function() {
                console.log('Connection :: ready');
               // conn.shell(onShell);
            }); 
var onShell = function(err, stream) { 
                  //  stream.write(command+''n');
                    stream.on('data', function(data) {
                        console.log('STDOUT: ' + data);
                    });
                    stream.stderr.on('data', function(data) {
                    console.log('STDERR: ' + data);
                   });
          }

var webSocketsServerPort=5000;
var ssh2ConnectionControl=false;
var server = http.createServer(function (req, res) {
  //blahbalh
}).listen(webSocketsServerPort, function() {
    console.log((new Date()) + " Server is listening on port:: " + webSocketsServerPort);
});
//console.log((new Date()) + 'server created');
wsServer = new WebSocketServer({
    httpServer: server,
 //   autoAcceptConnections: false
});
wsServer.on('request', function(request) {
    console.log((new Date()) + ' Connection from origin ' + request.origin + '.');
    var wsconnection = request.accept('echo-protocol', request.origin);
    console.log((new Date()) + ' Connection accepted.');
    if(!ssh2ConnectionControl){
      conn.connect({
                host: 'localhost',
                port: 22,
                username: 'attilaakinci',
                password: '1'
              });
      ssh2ConnectionControl=true;
        console.log('SSH Connected.');       
    } 
    wsconnection.on('message', function(message) {
        if (message.type === 'utf8') {
            console.log('Received Message: ' + message.utf8Data);
            command=message.utf8Data;
            //if(firstcom){
            //  conn.shell(onShell);
            //  firstcom=false;
            //}else{
              conn.exec(message.utf8Data,onShell);
            //}
            wsconnection.send(message.utf8Data);
        }
        else{
            console.log('Invalid message');
        }
    });
    wsconnection.on('close', function(reasonCode, description) {
        console.log((new Date()) + ' Peer ' + wsconnection.remoteAddress + ' disconnected.');
    });
});