RoboLab VLAB server

Starting from a Desktop install of Ubuntu 20.04:

Setup XDM as the display manager (the program that displays the login screen)

apt-get install xdm

When prompted as by apt-get's post-install, configure XDM to start as default (instead of lightdm, or any other display managers)

Edit /etc/X11/xdm/Xservers:
Comment out the line for display ":0..."

Edit /etc/X11/xdm/xdm-config:
Comment out: "DisplayManager.requestPort: 0"

Edit /etc/X11/xdm/Xaccess:
Allow all hosts (Uncomment-out appropriate line)

Install TigerVNC server

1. Go to www.tigervnc.org navigate to the download pages
2. Download tigervnc-1.13.1.x86_64.tar.gz
3. Untar into /usr/local
4. Create symlink to tigervnc

Install xvncrunner

xvncrunner is an eternal service, written in Tcl, which listens on the various 59XX TCP ports and launches TigerVNC server instances to suit incoming connections.

apt-get install tcl tcl-thread

Copy from New World:

• /etc/systemd/system/xvncrunner.service
• /usr/local/infrastructure/vlab/xvncrunner(|.sh)

systemctl daemon-reload
systemctl enable xvncrunner
systemctl start xvncrunner

Install xfce4

apt-get install xfce4

Set up a user .xsession file to start xfce4-session (chmod 755)

Notes

• systemctl set-default graphical
• systemctl set-default multi-user