/**
   * Creates a channel for shell type in the current session channel types = shell, sftp, exec(X
   * forwarding), direct-tcpip(stream forwarding) etc
   *
   * @param sshContact ID of SSH Contact
   */
  public void createShellChannel(ContactSSH sshContact) throws IOException {
    try {
      Channel shellChannel = sshContact.getSSHSession().openChannel("shell");

      // initalizing the reader and writers of ssh contact
      sshContact.initializeShellIO(shellChannel.getInputStream(), shellChannel.getOutputStream());

      ((ChannelShell) shellChannel)
          .setPtyType(sshContact.getSSHConfigurationForm().getTerminalType());

      // initializing the shell
      shellChannel.connect(1000);

      sshContact.setShellChannel(shellChannel);

      sshContact.sendLine("export PS1=");
    } catch (JSchException ex) {
      sshContact.setSSHSession(null);
      throw new IOException("Unable to create shell channel to remote" + " server");
    }
  }
 /**
  * Closes the Shell channel are associated IO Streams
  *
  * @param sshContact ID of SSH Contact
  */
 public void closeShellChannel(ContactSSH sshContact) throws JSchException, IOException {
   sshContact.closeShellIO();
   sshContact.getShellChannel().disconnect();
   sshContact.setShellChannel(null);
 }