TLDR
: This is a set of instructions to help set up ROS 1 Noetic on Ubuntu 20.04.
sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
sudo apt-get update && sudo apt-get install curl -y
curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -
sudo apt-get update && sudo apt install ros-noetic-desktop-full -y
sudo apt install python3-rosdep python3-rosinstall python3-rosinstall-generator python3-wstool build-essential python3-rosdep -y