Installing Docker on Linux

There are literally hundreds of guides on the internet to install Docker on Linux. I wanted to provide brief guides on how to install on CentOS and Ubuntu. You can always download the latest guides from docs.docker.com. This guide will provide the method to install the community edition of docker. In some cases you might want to install the vendor provided version (Redhat) in that case use your vendors recommendations.

Install Docker CE on CentOS (RedHat)

First install dependencies:

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

Then add the repository for Docker CE:

sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

Now install the server, cli and drivers

sudo yum install docker-ce docker-ce-cli containerd.io

Start up the server

sudo systemctl start docker

Enable server to start at boot time

sudo systemctl enable docker

Installing Docker CE on Ubuntu

First install dependencies:

sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

Then add the repository for Docker CE:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add –
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu  $(lsb_release -cs)  stable" 

Now install the server, cli and drivers

sudo apt-get install docker-ce

Start up the server

sudo systemctl start docker

Enable server to start at boot time

sudo systemctl enable docker

Testing Docker

Test docker by checking the installed version

docker --version

and running a basic container

docker run hello-world