Running a Ruby Script Without Ruby Installed

Basic command

Let’s write our first Docker command using the following format.

docker run [OPTIONS] <image> <command>

Below are some details about the command:

• The word docker is used before every docker command.
• To start a new container run is used based on an image, and to execute commands inside the container.
• The [OPTIONS] are used to define additional usage along with the start of the container. Click here for more details on OptionsUntitledConcept1
• The <image> is to be replaced with the name of an image.
• The <command> specifies what we want to run inside the container.
  
  

Ruby command

Next, we will use Docker to run a Ruby application without Ruby installed on our system. For this, we will use the following statement:

$ docker run ruby:2.7 ruby -e "puts :hello"

Try to connect the terminal and see the result of this command in action.