docker installation failed on Ubuntu 20.04 LTS(Vmware) [closed] - docker

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I am following the docker installation on Ubuntu 20.04 using https://docs.docker.com/engine/install/ubuntu/ in Ubuntu VM on VMware.
But when running the command to add the repository to Ubuntu.
sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
gnupg-agent \
software-properties-common
I am getting below error
Get:1 http://us.archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:3 http://dl.google.com/linux/chrome/deb stable Release
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease
Ign:6 https://download.docker.com/linux/ubuntu focal InRelease
Err:7 https://download.docker.com/linux/ubuntu focal Release
404 Not Found [IP: 13.225.7.126 443]
Get:8 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease [89.1 kB]
Hit:9 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
E: The repository 'https://download.docker.com/linux/ubuntu focal 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.
when running command
sudo apt-get install docker-ce docker-ce-cli containerd.io
I get error
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package docker-ce is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'docker-ce' has no installation candidate
E: Unable to locate package docker-ce-cli
E: Unable to locate package containerd.io
E: Couldn't find any package by glob 'containerd.io'
E: Couldn't find any package by regex 'containerd.io'
What is the reason for this?
I am new to docker.
Is there a workaround to this or should I install docker using source code or something?
Thank you.

Answer 1

For the moment, you can use :
sudo apt-get install -y docker.io
And then check with :
docker -v

Answer 2

According to the documentation followed by a test on my PC, these instructions will install docker successfully on WMware Ubuntu focal:
sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates curl gnupg
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

Answer 3

Docker has not released the repository for focal fossa (20.04) yet. As #Wared said, running
sudo apt install -y docker.io
will get docker from ubuntu repository.
I am able to use all my docker images that I used to in 18.04 successfully on 20.04 with this docker installation.

Answer 4

I know the question is about Ubuntu 20. But in case you are trying to install it on Linux Mint 20 (like me), the problem looks the same but the answer is different.
The installation guide tells you to add the PPA like this:
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
However, the $(lsb_release -cs) part is the problem, because it passes the release name as a parameter to the repository command. In Ubuntu 20 that command outputs focal and everything goes well, but in Linux Mint that command outputs ulyana and it fails because docker does not have that release.
If you want to install it on mint, just replace that command with the focal string so you get the ubuntu focal version:
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
focal \
stable"

Answer 5

According to the information at https://docs.docker.com/engine/install/ubuntu/ Ubuntu 20.04 is not supported at the moment.

Answer 6

The docker repositories for Ubuntu 20.04 LTS arent ready yet (I dont understand why they didnt concentrate on that instead of getting out a version for non LTS releases like 19.10!).
But the version that is already available in the Ubuntu Universe repository is recent, so just use this in the meantime.
When the guys at Docker are ready to publish their 20.04 repo, just follow this instruction: https://docs.docker.com/engine/install/ubuntu/
..then, of course also including the section "Uninstalling old versions". This way, you can already start to use Docker on Ubuntu 20.04

Answer 7

The above error occurs due to unclean copy of the commands. Please consider this and copy the command once again to resolve the error. It helped me rectify the same error.

Answer 8

This is what solved my problem:
dpkg -i --ignore-depends=docker-ce lando-stable.deb
FROM https://docs.lando.dev/getting-started/installation.html#caveats