Update the apt package index: sudo apt-get update Install packages to allow apt to use a repository over HTTPS: $ sudo apt-get install \ apt-transport-https \ ca-certificates \ curl \ software-properties-common Add Docker’s official GPG key: $ 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 \ $( lsb_release -cs ) \ stable" sudo apt-get update sudo apt-get install docker-ce sudo docker run hello-world