尝试在Ubuntu 18.10（cosmic）中安装Docker。如果我在comand下面执行，则无法添加docker存储库： sudo add-apt-repository“ deb [arch = amd64] https://download.docker.com/linux/ubuntu $（lsb_release -cs）稳定”
下面是错误详细信息：
Ign:1 https://download.docker.com/linux/ubuntu cosmic InRelease
Hit:2 http://archive.ubuntu.com/ubuntu cosmic InRelease
Ign:3 https://download.docker.com/linux/ubuntu Bionic InRelease
Hit:4 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease
Hit:5 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease
Err:6 https://download.docker.com/linux/ubuntu cosmic Release
404 Not Found [IP: 2600:9000:2098:7e00:3:db06:4200:93a1 443]
Hit:7 http://archive.ubuntu.com/ubuntu cosmic-security InRelease
Err:8 https://download.docker.com/linux/ubuntu Bionic Release
404 Not Found [IP: 2600:9000:2098:7e00:3:db06:4200:93a1 443]
Reading package lists... Done
E: T**he repository 'https://download.docker.com/linux/ubuntu cosmic Release' does not have a Release file.**
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: **The repository 'https://download.docker.com/linux/ubuntu Bionic Release' does not have a Release file.**
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.