A nice little post detailing how to install Docker CE on a Centos 7 machine.

 

Step 1) In a terminal windows type the following command: sudo yum install -y yum-utils device-mapper-persistent-data lvm2

 

 

 

Step 2) You need to setup a stable repository with this command: sudo yum-config-manager –add-repo https://download.docker.com/linux/centos/docker-ce.repo

 

 

Step 3) Install docker CE with this command: sudo yum install docker-ce

 

 

Accept all the defaults (i.e. select y) while being promoted in step 3. After that, you should have a working copy of Docker CE installed.

 

Step 4) Start Docker with this command: sudo systemctl start docker

 

The next step is optional but it will mean you can run docker without typing sudo every time: sudo usermod -aG docker ricky < substitute my name for your username.

 

Now log out of Centos and log back in again… Its time to test it work… Open a terminal window again and lets download a container and run it by typing:  docker run hello-world

You should see a hello world message and some info…