Installing Docker in Linux Mint

If you are using Linux Mint and following the docker’s official guide to install docker then you might get an error while trying to add the docker repository. Here is how you solve it.

Update the apt package index

sudo apt-get update

Install packages to allow apt to use a repository over HTTPS

sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg2 \

Add Docker’s official GPG key

curl -fsSL | sudo apt-key add -

Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.

sudo apt-key fingerprint 0EBFCD88

pub   4096R/0EBFCD88 20sudo apt-get install docker-ce docker-ce-cli containerd.io17-02-22
      Key fingerprint = 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid                  Docker Release (CE deb) <[email protected]>
sub   4096R/F273FCD8 2017-02-22

This is where we have to do things manually.

Add the docker repository manually to the sources

sudo vim /etc/apt/sources.list.d/additional-repositories.list

Add the following line to the file

For Linux Mint 19+

deb [arch=amd64] bionic stable

For Linux Mint 20+

deb [arch=amd64] focal stable

Update the apt

sudo apt-get update

Install the latest version of Docker Engine - Community and containerd, or go to the next step to install a specific version:

Latest Version

sudo apt-get install docker-ce docker-ce-cli

Specific Version

a. List the versions available in your repo:

apt-cache madison docker-ce

b. Install a specific version using the version string from the second column, for example, 5:18.09.1~3-0~debian-stretch

sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING>

Manage Docker as non-root user

1 Create the docker group

sudo groupadd docker

2 Add your user to the docker group.

sudo usermod -aG docker $USER

3 Activate the changes using the following command or logout

newgrp docker

4 Start docker service on boot

sudo systemctl enable docker

Verify that Docker is installed properly

sudo docker run hello-world

Taken from

Get Docker Engine - Community for Debian

Post-installation steps for Linux

Docker installation on Linux Mint 19.2 doesn’t work

Further Reading

Tricia and Bionic

What is sources.d

· linux