Docker exec is a command-line interface tool that allows users to run commands inside a running Docker container.

This tool is particularly useful for debugging, troubleshooting, and managing containers in real-time.

By using docker exec, users can access the shell of a container and execute commands as if they were working directly on the container itself. One of the key benefits of using docker exec is that it enables users to interact with containers without the need to stop or restart them.

This can be especially helpful when troubleshooting issues or making changes to a container while it is running in a production environment.

Additionally, docker exec allows users to run multiple commands in a single session, making it easier to perform complex tasks within a container. To use docker exec, users simply need to specify the container ID or name, along with the command they wish to run.

For example, to access the shell of a container named "webserver," a user would run the command "docker exec -it webserver /bin/bash." This would open a new shell session within the "webserver" container, allowing the user to execute commands as needed. Overall, docker exec is a powerful tool that enhances the functionality and flexibility of Docker containers.

By providing a simple and efficient way to interact with running containers, docker exec empowers users to effectively manage their containerized applications and infrastructure.