How to execute docker exec commande inside a docker container ?

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I execute a command inside a docker container :

docker exec -i nullmailer sendmail -f username@gmail.com

The container response is :

the docker command does not exist.

How to execute docker exec command inside a docker container ?

Jul 19, 2018 in Docker by Nilesh
• 6,900 points
178 views

1 answer to this question.

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If your containers are running on the same host, you can run docker commands inside the container, by exposing the docker socket to the container.

To achieve this, when running the container, mount the docker.sock as such:

docker run -v /var/run/docker.sock:/var/run/docker.sock ...

Now you can execute docker commands from within the container.

answered Jul 19, 2018 by Kalgi
• 2,620 points
And for Windows it is:

`docker run -v //var/run/docker.sock:/var/run/docker.sock ...`
Hi @Werner, Can you put this up as an answer? It'll be helpful for other readers. Thank you!

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