1. Install CLI Tools: Use "sudo npx" commands to install necessary tools:

   • For basic setup: sudo npx vpn-server --version
   • For more advanced configuration: sudo npx vpn-server config --version

2. Choose a VPN Server Tool: Based on security needs, select a tool. For example, the "vpn-server" CLI tool is suitable for basic setup.

3. Configure the Server:

   • Install encryption keys: Use sudo npx vpn-server-key --version to get encryption keys.
   • Configure ports: Use sudo npx vpn-server config --port to set up port forwarding.
   • Set up server configuration: Use sudo npx vpn-server config --config to specify the server's details.

4. Start the Server: Execute the server command:

   • sudo npx vpn-server start

5. Test the Server: Use a web browser to connect and test traffic. Check logs for any errors.

6. Optional: Firewall Setup: Configure a firewall to block unwanted traffic by specifying IP addresses or ports in the server setup.

7. Select VPN Type: Choose between symmetric or asymmetric VPNs based on security needs. Research newer versions for enhanced features.

8. Consider Client Instances: If using a VPN instance, create a separate client (e.g., "sudo npx vpn-client start") that connects to the server instance.

9. Ongoing Updates: Keep the server updated with security patches via your distribution's package manager.

By following these steps, you can set up a secure Linux VPN server tailored to your preferences and needs.