Installing Ros 2:

Link here

notes: follow the instructions for setting locale on the link above, but then add the ROS 2 apt repository to your system before following the rest of the instructions

After Installing ROS 2

Building ViS in ROS 2 workspace:

Download diux and diux msgs directories from github
Place diux and diuxmsgs directories in ~ros2_ws/src/ros2
Build diux msgs: colcon build --symlink-install --packages-select diux_msgs
Run: . install/local_setup.bash
Build diux: colcon build --symlink-install --packages-select diux
Run: . install/local_setup.bash
To run ViS: ./install/diux/bin/ViS