Docker - Define environment variables in a container using the docker run -e or --env command

This  assumes you have installed Docker on Linux and Docker is running.

The -e or --env option can be used to define environment variables. In this example, when using the docker run command to create snd start the Hello world container,  the "foo" variable contains a value of "bar". This assumes that the Hello world service is configured to use the foo variable. 

docker run --env foo=bar hello-world

 




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