如何用VNC监控20+台Xubuntu瘦客户端？教室场景技术问询

Hey there, let's work through your classroom monitoring setup. Since you're running Ubuntu 16.04 and need to keep tabs on all those Xubuntu thin clients to monitor activity and help students out, here are practical VNC and RDP-based solutions that fit your needs:

VNC is perfect here because it's lightweight and plays nicely with Xubuntu's minimal footprint. Here's how to set it up:

1. 批量配置Xubuntu瘦客户端的VNC服务 #

You don't want to configure each client manually—let's automate this (assuming you have SSH access to all clients with sudo rights):

• First, install the lightweight x11vnc server on all clients (it mirrors the existing desktop session instead of creating a new one):

  # Run this from your Ubuntu 16.04 monitor machine (set up SSH key auth first for passwordless access)
  for CLIENT_IP in 192.168.1.101 192.168.1.102 192.168.1.103; do
    ssh $CLIENT_IP "sudo apt-get update && sudo apt-get install x11vnc -y"
    # Set a shared VNC password (replace 'your_secure_password' with a strong one)
    ssh $CLIENT_IP "x11vnc -storepasswd your_secure_password ~/.vnc/passwd"
    # Configure x11vnc to start automatically when the client boots
    ssh $CLIENT_IP "echo -e '[SeatDefaults]\ndisplay-setup-script=/usr/bin/x11vnc -forever -usepw -display :0' | sudo tee /etc/lightdm/lightdm.conf.d/50-x11vnc.conf"
    ssh $CLIENT_IP "sudo systemctl restart lightdm"
  done
  

  This will make each client start a VNC server on port 5900 (default) as soon as it boots, mirroring the student's desktop.

2. 监控端（Ubuntu 16.04）查看所有终端画面 #

You have two great options here:

• Option 1: Multi-window view with Vinagre (Ubuntu's built-in VNC client):
  • Install it if you don't have it: sudo apt-get install vinagre
  • Open Vinagre, click "Connect" and enter each client's address in the format CLIENT_IP:0 (e.g., 192.168.1.101:0), then enter the password you set.
  • Save all connections for quick access later, then arrange the windows on your monitor screen however you like.
• Option 2: Single-window grid view with MultiVNC (better for at-a-glance monitoring):
  • Install it: sudo apt-get install multivnc
  • Open MultiVNC, click "Add" to input each client's VNC address and password.
  • It will automatically arrange all client screens in a grid within one window—perfect for keeping an eye on the entire class without switching between windows.

If your students are using the Xubuntu thin clients to connect to a central desktop server (like LTSP), or if you prefer RDP over VNC, here's how to set this up:

1. 配置客户端或服务器RDP服务 #

• If clients run local Xubuntu sessions: Install xrdp on each client to enable RDP access:

  # Again, run this from your monitor machine for batch setup
  for CLIENT_IP in 192.168.1.101 192.168.1.102; do
    ssh $CLIENT_IP "sudo apt-get install xrdp -y && sudo systemctl enable --now xrdp"
  done
  

• If students connect to a central server: On the server, you can enable VNC/RDP access to each user's remote session. For example, use xrdp on the server to allow you to connect directly to individual student sessions.

2. 监控端查看RDP会话 #

• Install Remmina (a versatile RDP/VNC client for Ubuntu):

  sudo apt-get install remmina remmina-plugin-rdp
  

• Open Remmina, create a new RDP connection for each client (or server user session) with the client/server IP, username, and password.
• Similar to VNC, you can open multiple Remmina windows or use a window manager like i3 to tile them for a unified view.

• Secure your connections: Restrict VNC/RDP access to only your monitor machine's IP using UFW on each client:

  ssh $CLIENT_IP "sudo ufw allow from YOUR_MONITOR_IP to any port 5900" # For VNC
  # OR for RDP:
  ssh $CLIENT_IP "sudo ufw allow from YOUR_MONITOR_IP to any port 3389"
  

• Simplify window management: If you have many clients, consider installing a tiling window manager like i3 on your Ubuntu 16.04 monitor machine—it will automatically arrange all VNC/RDP windows in a grid without manual dragging.
• Troubleshooting: If VNC doesn't connect, check that x11vnc is running on the client (ps aux | grep x11vnc) and that the firewall isn't blocking port 5900.

内容的提问来源于stack exchange，提问作者rvcabc