x11vnc
VNC server for existing X displays
TLDR
Share current display with multiple clients
$ x11vnc -shared
Run in view-only mode persistently$ x11vnc -forever -viewonly
Launch on a specific display and screen$ x11vnc -display :[display].[screen]
Launch on the third display's default screen$ x11vnc -display :2
Launch on the first display's second screen$ x11vnc -display :0.1
Start with password protection$ x11vnc -passwd [mypassword] -forever
Start with SSL encryption$ x11vnc -ssl -forever
SYNOPSIS
x11vnc [options]
DESCRIPTION
x11vnc allows VNC access to an existing X11 display. Unlike other VNC servers that create virtual displays, x11vnc shares the actual running desktop, allowing remote control of the physical display.The server captures the display content and transmits it to VNC clients. By default, it terminates when all clients disconnect, unless -forever is specified.
PARAMETERS
-display _display_
X display to share (e.g., :0, :1.0)-shared
Allow multiple simultaneous clients-forever
Don't exit when last client disconnects-viewonly
Clients can only view, not interact-passwd _password_
Set VNC password-rfbauth _file_
Use password file-rfbport _port_
Set VNC port (default: 5900)-noxdamage
Disable X DAMAGE extension-clip _WxH+X+Y_
Share only a portion of the screen-scale _fraction_
Scale the framebuffer-ssl
Enable SSL/TLS encryption
INSTALL
sudo apt install x11vnc
sudo dnf install x11vnc
sudo pacman -S x11vnc
sudo apk add x11vnc
sudo zypper install x11vnc
brew install x11vnc
nix profile install nixpkgs#x11vnc
CAVEATS
Requires an existing X display to be running. May have performance issues with compositing window managers. Security concerns when used without encryption; consider using -ssl or tunneling over SSH.
