How do I start VNC on a specific port?

To start a VNC server on a specific port, you need to specify a display number when running the vncserver command.

Understanding VNC Ports and Display Numbers

When you start a VNC server, it typically uses a display number (e.g., :1, :2, :3). The actual port number that the VNC server listens on is determined by adding 5900 to this display number.

According to the reference:

• Once you're logged into your remote machine, you can start the VNC server by running the vncserver command.
• If you want to specify a port, you can do so by adding :<display-number> to the command.
• The actual port number will be 5900 plus the ``.

Therefore, to target a specific port, you calculate the required display number by subtracting 5900 from your desired port.

Starting VNC with a Specific Port

You start the VNC server on a port corresponding to a specific display number using the following command structure:

vncserver :<display-number>

Replace <display-number> with the desired display number.

Examples

Here are a few examples demonstrating the relationship between the display number and the resulting port:

Desired Display Number	Resulting Port (5900 + Display Number)	Command
:1	5901	vncserver :1
:2	5902	vncserver :2
:10	5910	vncserver :10

By running vncserver with the appropriate display number, you initiate the VNC server process listening on the corresponding port.