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Can anyone say me how to set a VNC password in Ubuntu? Such that if anyone access my machine through VNC it should prompt for a password.

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You can set a password when you open Remote Desktop.

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Or withvncpasswd you can also set the password for the vnc-server.

So if someone want to connect to you, he has to enter the password.

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  • vncpasswd doesn't work for me.
    – karthick87
    Apr 24 '11 at 13:13
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    Which vnc server do you use? Start Options: vnc4server: Command to start: vncserver. Then run vncpasswd. tightvncserver: Command to start: tightvncserver. Then run vncpasswd. Gnome build in vino-server: Command to start: vino-preferences And Activate: "Allow other users to view your desktop" and set a password.
    – Dani3l
    Apr 25 '11 at 7:29
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In my case, I forgot the password to the VNC server. For my situation, the final target was TightVNC running on Ubuntu 18.04 which I needed to reach from my mac.

You first kill the existing VNC sessions with

vncserver -kill :1

Use something like this to find out if you've killed all sessions. Usually, the vncserver is running on port 5901:

sudo netstat -peanut | grep "vncserver"

If there is something, repeat the kill command with the appropriate vncserver -kill :2 or whatever listing. If nothing, then you can remove the default original password setting with:

sudo rm ~/.vnc/passwd

Restart the vncserver as:

vncserver

And you'll be prompted again for a new password. The daemon should run on port 5901, which you can query with the netstat command above.

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