Install Docker on Ubuntu 20.x without reading the manual

install-docker.sh

#!/bin/bash


_install_docker() {
  echo "> Starting Docker setup!"
  apt-get remove docker docker.io containerd runc
  apt-get update
  apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
  add-apt-repository \
         "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
            $(lsb_release -cs) \
               stable"
  apt-get update
  apt-get install docker-ce docker-ce-cli containerd.io
  printf "\n\n== Test if docker works ==\n\n"
  docker run hello-world
  echo "> If you saw the hello world message everything went fine"
  echo "> In case you saw something go wrong please read the manual: 'https://docs.docker.com/engine/install/ubuntu'"
}

printf "\n"
echo "> This script is for lazy people"
echo "> If you have no idea what are you doing please goto 'https://docs.docker.com/engine/install/ubuntu/'"

if [ "$EUID" -ne 0 ]
  then echo "> And you are not root or using sudo. Sorry but you can't install Docker like that"
  exit 1
fi
printf "\n\n"
echo "To continue enter the number of your choice"
select yn in "Yes" "No"; do
    case $yn in
        Yes ) _install_docker; break;;
        No ) echo "> Docker setup canceled"; exit;;
    esac
done