In your home directory, create a FundamentalsOfDocker folder and navigate to it:
$ mkdir ~/FundamentalsOfDocker$ cd ~/FundamentalsOfDocker
In the preceding folder, create a sample1 subfolder and navigate to it:
$ mkdir sample1 && cd sample1
Use your favorite editor to create a file called Dockerfile inside this sample folder with the following content:
FROM centos:7RUN yum install -y wget
Save the file and exit your editor.
Back in the Terminal, we can now build a new container image using the preceding Dockerfile as a manifest or construction plan:
$ docker image build -t my-centos .
Please note that there is a period at the end of the preceding command. This command means that the Docker builder is creating a new image ...
