Ubuntu Server 20.04 LTS install Docker

uninstall old docker version

sudo apt-get remove docker docker-engine docker.io containerd runc

Set up the repository

sudo apt-get update

sudo apt-get install
ca-certificates
curl
gnupg
lsb-release

sudo mkdir -p /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

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

Install Docker Engine

sudo apt-get update sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

check docker version

docker version

run a hello world demo.

Verify that Docker Engine is installed correctly by running the hello-world image.

sudo docker run hello-world

reference:

https://docs.docker.com/engine/install/ubuntu/