我已经按照教程https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-using-the-repository添加了存储库
但是当我运行sudo apt-get update时，我得到了以下堆栈
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) …