You can download from this page pre-configured Linux image for single board computers.
CORE2-ROS image - Linux + ROS image for single board computers

Customized Linux operating system for Rapsberry Pi 3/4, ASUS Tinker Board and UpBoard with pre-installed ROS packets, Husarnet, and software to communicate with CORE2 real-time control board.

Ubuntu 18.04 + ROS Melodic - suggested for creating new projects
Tinker Board UpBoard Raspberry Pi
Ubuntu 16.04 + ROS Kinetic - supported until April 2021
Tinker Board UpBoard Raspberry Pi
Ububtu 18.04 + ROS2 Dashing
Tinker Board UpBoard