I'm new to Linux and as such I'm sure that I'm missing something simple. I'm following instructions via Docker Engine Install

After running

$ echo
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

and then running

$ sudo apt-get update

I'm getting this back

Ign:1 http#://packages.linuxmint.com una InRelease Hit:2 http#://packages.linuxmint.com una Release
Hit:3 https#://dl.google.com/linux/chrome/deb stable InRelease
Ign:5 https#://download.docker.com/linux/ubuntu una InRelease
Hit:6 http#://repository.spotify.com stable InRelease
Hit:7 https#://repo.nordvpn.com//deb/nordvpn/debian stable InRelease
Err:8 https#://download.docker.com/linux/ubuntu una Release
404 Not Found [IP: 443] Hit:9 http#://archive.canonical.com/ubuntu focal InRelease
Hit:10 http#://archive.ubuntu.com/ubuntu focal InRelease
Get:11 http#://security.ubuntu.com/ubuntu focal-security InRelease [114 kB] Get:12 http#://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB] Get:13 http#://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB] Reading package lists... Done
E: The repository 'https#://download.docker.com/linux/ubuntu una 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.

Fairly sure that I could just download the package, but then I'd have to manually update. So this is essentially where I'm stuck.

My info:

NAME="Linux Mint" VERSION="20.3 (Una)" ID=linuxmint ID_LIKE=ubuntu PRETTY_NAME="Linux Mint 20.3" VERSION_ID="20.3"

I added # to links to break them. I don't have enough clout to post that many links to a question.

Any help is appreciated!

1 Answer 1


you can hard code your goal ubuntu version in this comand, just replace $(lsb_release -cs) with my goal ubuntu version "focal" (20.04) but i have 20.03.

$ echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu focal stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Worked for me. GL!

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