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Environmental Variable Inside The Docker Container

Is The Environmental Created Inside The Container Or The Underlying Operating System?

Prerequisite

Create A Container With Environmental Variables

docker run -e VAR1=value1 -e VAR2=value2 --name environmentvariabledemo -it -d -p 85:80 ubuntu

1. VAR1 and VAR2 and environmental variables
2. environmentvariabledemo is the container name

Check The Value Of The Environment Variable

docker exec -it environmentvariabledemo sh
echo $VAR1

Output