dockerインストール
$ sudo apt update
$ sudo apt upgrade
$ sudo apt -y install apt-transport-https ca-certificates curl gnupg software-properties-common lsb-release
$ 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"
$ sudo apt update
$ sudo apt install docker-ce
$ sudo reboot
$ systemctl status docker
docker-composeインストール
$ sudo curl -L https://github.com/docker/compose/releases/download/1.28.6/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
$ sudo chmod +x /usr/local/bin/docker-compose
$ docker-compose --version
Dockerのアンインストール
$ sudo apt remove docker docker-engine docker.io
$ sudo apt purge docker-ce
$ sudo rm -rf /var/lib/docker
$ sudo apt autoremove
