$ 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 apt-key fingerprint 0EBFCD88 $ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable" $ sudo apt update $ sudo apt install docker-ce $ sudo usermod -aG docker ya
ログインしなおす
$ docker run hello-world