Ubuntu VNC如何使用VNC客户端

Using a VNC Client to Connect to an Ubuntu VNC Server

To connect to an Ubuntu system running a VNC server using a VNC client, follow these streamlined steps focused on the client-side setup and connection process:

1. Install a VNC Client on Your Local Device

First, download and install a compatible VNC client on the device you’ll use to connect to the Ubuntu server. Popular cross-platform options include:

• TightVNC Viewer (free, lightweight): Download from TightVNC’s official site.
• RealVNC Viewer (user-friendly, supports encryption): Available from RealVNC’s website.
• Remmina (open-source, supports multiple protocols): Install via Ubuntu’s Software Center or with sudo apt install remmina.

These clients are widely supported and work well with Ubuntu VNC servers.

2. Obtain the Ubuntu Server’s IP Address

You need the IP address of the Ubuntu system running the VNC server to establish a connection. On the Ubuntu server, open a terminal and run:

ip a

Look for the inet value under your active network interface (e.g., eth0 or wlan0). For example, 192.168.1.100 is a common local IP address.

3. Launch the VNC Client and Enter Connection Details

Open your installed VNC client and input the following information in the connection prompt:

• Server Address: The Ubuntu server’s IP address (e.g., 192.168.1.100).
• Port Number: The VNC server’s display number converted to a port (default: :1 = 5901, :2 = 5902, etc.). This is critical—VNC uses port 5900 + display number.

Example: If the server uses :1, enter 192.168.1.100:5901 in the client.

4. Authenticate with the VNC Password

When you click “Connect,” the VNC client will prompt for a password. This is the password you set up on the Ubuntu server when configuring the VNC server (using the vncpasswd command). Enter the password to proceed.

5. (Optional) Enhance Security with SSH Tunneling

For public or untrusted networks, encrypt your VNC connection using an SSH tunnel. This prevents unauthorized access to your VNC traffic. Here’s how:

• On your local device, open a terminal and run:

  ssh -L 5901:localhost:5901 username@ubuntu_server_ip
  

  Replace username with your Ubuntu server’s username and ubuntu_server_ip with its IP address.
• Keep the SSH session open, then open your VNC client and connect to localhost:5901. The SSH tunnel will forward your connection securely to the Ubuntu server.

By following these steps, you can securely and efficiently connect to an Ubuntu VNC server using a VNC client. Remember to always use strong passwords and consider additional security measures (like SSH tunnels) for sensitive environments.

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