Chapter 15. Starting a remote installation by using VNC 15.1. Performing a remote RHEL installation in VNC Direct mode Use this procedure to perform a remote RHEL installation in VNC Direct mode. Direct mode expects the VNC viewer to initiate a connection to the target system that is being installed with RHEL. In this procedure, the system with the VNC viewer is called the remote system. You are prompted by the RHEL installation program to initiate the connection from the VNC viewer on the remote system to the target system. Note This procedure uses TigerVNC as the VNC viewer. Specific instructions for other viewers might differ, but the general principles apply. Prerequisites You have installed a VNC viewer on a remote system as a root user. You have set up a network boot server and booted the installation on the target system. Procedure From the RHEL boot menu on the target system, press the Tab key on your keyboard to edit the boot options. Append the inst.vnc option to the end of the command line. If you want to restrict VNC access to the system that is being installed, add the inst.vncpassword=PASSWORD boot option to the end of the command line. Replace PASSWORD with the password you want to use for the installation. The VNC password must be between 6 and 8 characters long. This is a temporary password for the inst.vncpassword= option and it should not be an existing or root password. Press Enter to start the installation. The target system initializes the installation program and starts the necessary services. When the system is ready, a message is displayed providing the IP address and port number of the system. Open the VNC viewer on the remote system. Enter the IP address and the port number into the VNC server field. Click Connect . Enter the VNC password and click OK . A new window opens with the VNC connection established, displaying the RHEL installation menu. From this window, you can install RHEL on the target system using the graphical user interface. 15.2. Performing a remote RHEL installation in VNC Connect mode Use this procedure to perform a remote RHEL installation in VNC Connect mode. In Connect mode, the target system that is being installed with RHEL initiates a connect to the VNC viewer that is installed on another system. In this procedure, the system with the VNC viewer is called the remote system. Note This procedure uses TigerVNC as the VNC viewer. Specific instructions for other viewers might differ, but the general principles apply. Prerequisites You have installed a VNC viewer on a remote system as a root user. You have set up a network boot server to start the installation on the target system. You have configured the target system to use the boot options for a VNC Connect installation. You have verified that the remote system with the VNC viewer is configured to accept an incoming connection on the required port. Verification is dependent on your network and system configuration. For more information, see Security hardening and Securing networks . Procedure Start the VNC viewer on the remote system in listening mode by running the following command: Replace PORT with the port number used for the connection. The terminal displays a message indicating that it is waiting for an incoming connection from the target system. Boot the target system from the network. From the RHEL boot menu on the target system, press the Tab key on your keyboard to edit the boot options. Append the inst.vnc inst.vncconnect=HOST:PORT option to the end of the command line. Replace HOST with the IP address of the remote system that is running the listening VNC viewer, and PORT with the port number that the VNC viewer is listening on. Press Enter to start the installation. The system initializes the installation program and starts the necessary services. When the initialization process is finished, the installation program attempts to connect to the IP address and port provided. When the connection is successful, a new window opens with the VNC connection established, displaying the RHEL installation menu. From this window, you can install RHEL on the target system using the graphical user interface.

Commands:
vncviewer -listen PORT
TigerVNC Viewer 64-bit v1.8.0 Built on: 2017-10-12 09:20 Copyright (C) 1999-2017 TigerVNC Team and many others (see README.txt) See http://www.tigervnc.org for information about TigerVNC. Thu Jun 27 11:30:57 2019 main: Listening on port 5500