Running A Command
Part of the Introduction to Docker section of Coddy's Terminal journey — lesson 7 of 40.
You can tell a container exactly what command to run by adding it after the image name:
docker run alpine echo "hello from a container"Docker starts a container from the alpine image, runs echo "hello from a container" inside it, prints the output, then the container exits. The structure is:
docker run IMAGE COMMAND [ARGUMENTS]This is the everyday pattern for using a container as a throwaway environment: start it, run one command, and let it stop.
Challenge
BeginnerRun a container from the alpine image that prints containers are fun using echo.
Cheat sheet
Run a specific command in a container by appending it after the image name:
docker run IMAGE COMMAND [ARGUMENTS]Example: start an alpine container, run echo, then exit:
docker run alpine echo "hello from a container"Try it yourself
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Introduction to Docker
3Running Containers
Running A CommandReal ExecutionDifferent DistrosAuto-Remove ContainersRecap - Container Runner