Get Docker CE
Referenced to the official Docker instructions.
Note: This installation instructions is based on the example of the operating system Ubuntu 20.04 LTS.
SET UP THE REPOSITORY
Update the apt package index:
$ sudo apt-get update
Install packages to allow apt to use a repository over HTTPS:
$ sudo apt-get install ca-certificates curl gnupg lsb-release
Add Docker’s official GPG key:
$ curl -fsSL https://download.docker.com/linux/Ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
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 --keyring=/usr/share/keyrings/docker-archive-keyring.gpg fingerprint 0EBFCD88 pub rsa4096 2017-02-22 [SCEA] 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88 uid [unknown] Docker Release (CE deb) <docker@docker.com> sub rsa4096 2017-02-22 [S]
Use the following command to set up the stable repository. You always need the stable repository, even if you want to install builds from the edge or test repositories as well. To add the edge or test repository, add the word edge or test (or both) after the word stable in the commands below.
Note: The lsb_release -cs sub-command below returns the name of your Ubuntu distribution, such as xenial. Sometimes, in a distribution like Linux Mint, you might have to change $(lsb_release -cs) to your parent Ubuntu distribution. For example, if you are using Linux Mint Rafaela, you could use trusty.
amd64:
$ echo "deb [arch=$(dpkg --print-architecture) 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
INSTALL DOCKER CE
Update the apt package index:
$ sudo apt-get update
Install the latest version of Docker CE:
$ sudo apt-get install docker-ce docker-ce-cli containerd.io