sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
apt-cache policy docker-ce
sudo apt install docker-ce

sudo systemctl status docker

 sudo usermod -aG docker $USER

Программа для конфигурирования docker.

Выяснить номер последнего релиза (например, 2.3.4).

    mkdir -p ~/.docker/cli-plugins/
    curl -SL -- https://github.com/docker/compose/releases/download/v2.3.4/docker-compose-linux-x86_64 -o ~/.docker/cli-plugins/docker-compose  # используйте актуальный номер релиза
    chmod +x ~/.docker/cli-plugins/docker-compose

docker pull alpine
docker images
docker run -it alpine
docker ps -a
docker ps -l  # latest
docker stop container_name