docker exec

Execute a command on an already running Docker container. More information: https://docs.docker.com/reference/cli/docker/container/exec/.

• Enter an interactive shell session on an already-running container:

docker exec --interactive --tty container_name /bin/bash

• Run a command in the background (detached) on a running container:

docker exec --detach container_name command

• Select the working directory for a given command to execute into:

docker exec --interactive --tty --workdir path/to/directory container_name command

• Run a command in background on existing container but keep stdin open:

docker exec --interactive --detach container_name command

• Set an environment variable in a running Bash session:

docker exec --interactive --tty --env variable_name=value container_name /bin/bash

• Run a command as a specific user:

docker exec --user user container_name command