I've added the repository as per the tutorial https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-using-the-repository
but when I run sudo apt-get update I get the following stack
Ign:9 https://download.docker.com/linux/ubuntu stretch/stable amd64 Packages
Ign:10 https://download.docker.com/linux/ubuntu stretch/stable all Packages
Ign:12 https://download.docker.com/linux/ubuntu stretch/stable Translation-en
Ign:13 https://download.docker.com/linux/ubuntu stretch/stable Translation-en_US
Err:9 https://download.docker.com/linux/ubuntu stretch/stable amd64 Packages
404 Not Found
Ign:10 https://download.docker.com/linux/ubuntu stretch/stable all Packages
Ign:12 https://download.docker.com/linux/ubuntu stretch/stable Translation-en
Ign:13 https://download.docker.com/linux/ubuntu stretch/stable Translation-en_US
Reading package lists... Done
W: The repository 'https://download.docker.com/linux/ubuntu stretch Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch https://download.docker.com/linux/ubuntu/dists/stretch/stable/binary-amd64/Packages 404 Not Found`
My /etc/apt/sources.list is as follow
deb http://deb.debian.org/debian stretch main
deb http://security.debian.org/debian-security stretch/updates main
deb [arch=amd64] https://download.docker.com/linux/ubuntu stretch stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu stretch stable
Ubuntu doesn't have stretch. You probably clicked on the wrong link on the docs. Replace ubuntu in the sources.list file URL with debian, as you seem to be on a debian machine.