Run a Command from Outside the Container

What is Docker Exec?

The `docker exec` is a docker command that allows users to run commands inside a running Docker container, bridging the gap between the container environment and the host system. This command opens up possibilities for troubleshooting and debugging. It performs administrative-related tasks within a live container....

Options of Docker Exec

The following are the options of Docker Exec Command:...

Examples of Docker Exec Command

The following are the examples of docker exec command:...

How to start and run a Docker Container?

The docker exec command is used to know the container that is running. So to execute the command you need a container which is already running if any container is running in the docker you can execute the command on that container....

Finding the Name of a Docker Container

To execute the docker exec command you need to know the or which is already running or the container that you have ruined for the test purpose....

Running an Interactive Shell in a Docker Container

The main reason behind to interact with the shell container is to to do some debugging like in the production servers you may face issues like the docker container was restarting automatically for certain interval of time in that case you can interact with the docker container shell and you perform the debugs....

Running a Command Non-interactively in a Docker Container

In the above example you are going to interact with the docker container shell. In some cases there is no need of interacting with the docker container you can directly install or perform the debugging operations just bu running the following command....

Running Commands in an Alternate Directory in a Docker Container

In some use cases like while downloading any type of software or package they will use the /opt directory. Instead of changing to that directory manually each time, you can run commands directly in the desired directory using the docker exec command with the --workdir option....

Running Commands as a Different User in a Docker Container

Running the commands as a different user is one of the best practices which is followed by everyone in the production server. The reasons are mentioned below....

Passing Environment Variables into a Docker Container

Environmental variable in the docker are used to perform the configurations in the docker container instead of hard coding the values you set them as an variable so you can pass them or changes them according to the requirements. Follow the steps mentioned below to pass the environmental variable of docker container....

Run a Command from Outside the Container

No need to access the docker container each and every time when you want to run the command inside the docker container. You can run the docker container command from the outside of the docker container so it will helps you to inspect the docker container and run the docker command at the same time for that you can use the following command....

Access the Running Container’s Shell

Acessing the running container shell will give you full command on the container it will be like executing the commands in the virtual machine to interact with the container shell you can use the following command...

Difference between Docker run and Docker exec

The following are the difference between docker run and docker exec:...

Conclusion

In conclusion, the `docker exec` command is mostly used for providing a seamless interaction with running containers. It is useful in troubleshooting the issues, performing the maintenance tasks and for conduction of security audits. `docker exec` provides the ability to enter inside the container environment and to execute the commands effortlessly. Mastering this command enhances control over container applications working more efficient and streamlined container management workflow....

Docker Exec – FAQs

What is Exec in Docker?...