vncviewer is a command-line tool that is used to launch a VNC (Virtual Network Computing) client. VNC is a remote desktop sharing system that allows users to connect to and control a graphical desktop environment on a remote system. VNC operates on the client-server model, where the VNC server is installed and running on the remote system, and the VNC client is used to connect to and interact with the server.
vncviewer is a client program that is used to connect to and display the graphical desktop environment of a VNC server. The user can interact with the remote system using their local mouse and keyboard, and the remote desktop is displayed in a window on the local system.
vncviewer provides a number of options and settings that can be used to configure the VNC connection, such as the remote host and port, display resolution, color depth, authentication, and encryption. These options can be specified on the command line or in a configuration file.
vncviewer is typically used in conjunction with a VNC server, which is installed and running on the remote system that the user wants to connect to. There are many VNC server implementations available for different operating systems, such as TightVNC, RealVNC, and TigerVNC.
vncviewer Command Examples
1. Launch a VNC client which connects to a host on a given display:
# vncviewer host:display_number
2. Launch in full-screen mode:
# vncviewer -FullScreen host:display_number
3. Launch a VNC client with a specific screen geometry:
# vncviewer --geometry widthxheight host:display_number
4. Launch a VNC client which connects to a host on a given port:
# vncviewer host::port
vncviewer is included in many Linux distributions and can be installed using package managers such as apt, yum, or pacman. The vncviewer command is also available on other platforms, such as macOS and Windows.
Overall, vncviewer is a powerful tool for remotely accessing and controlling graphical desktop environments on remote systems, and can be a valuable tool for system administration, remote support, and collaborative work.