code: function(command) {
        var t = this;
        t.shellCmd = ChildProcess.exec(command, function(err, stdout, stderr) {
          if (err) {
            var outstr = 'exit';
            if (err.code) {
              outstr += ' (' + err.code + ')';
            }
            if (err.signal) {
              outstr += ' ' + err.signal;
            }
            t._output(outstr);
            return null;
          }
          if (stdout.length) {
            t._output(stdout);
          }
          if (stderr.length) {
            t._output(stderr);
          }
          t.shellCmd = null;
          t._output(CONSOLE_PROMPT);
        });
        return null;
      }
docs: Run a shell command and emit the output to the browser.
  
  @private
  @method _runShellCmd
  @param {String} command - The shell command to invoke