It seems there might be some confusion in your query. If you're looking for a command-line client that allows you to connect to and use PPTP (Point to Point Tunneling) and also handle VPNs on Linux, you can use the ptpvpcmd package, which is designed for this purpose. Here's how you can approach it:

1. Install the Package: First, you need to install the ptpvpcmd package on your Linux system. You can do this using your package manager. For example, on Ubuntu/Debian, you can use: sudo apt install ptpvpcmd

2. Connect to PPTP Server: Once installed, you can connect to a PPTP server using ptpvpcmd. Here's a basic command to connect:

   ptpvpcmd -c -C root@server:port

   Replace server with the IP address of your PPTP server and port with the port number it's running on.

3. Use VPN for Further Tunneling: If you need to connect through a VPN, you can use another VPN client compatible with Linux (e.g., L2TP, OpenVPN, etc.) to create a tunnel between your PPTP client and the actual VPN server. For example, using L2TP:

   l2tp -C -T tunnel -C user@server:port

   Replace server and port with your VPN server details.

4. Security Considerations: Ensure that your PPTP server and VPN client are secure and handle VPN traffic appropriately to prevent unauthorized access.

If you need a specific example or further assistance, feel free to ask!