Opening a shell in container in Docker - Mini Project: Build & Apply

Opening a Shell in a Docker Container

📖 Scenario: You are working with Docker containers to run applications. Sometimes, you need to open a shell inside a running container to check files, run commands, or debug issues.

🎯 Goal: Learn how to open an interactive shell inside a running Docker container using the correct Docker command.

📋 What You'll Learn

Use the exact container name my_container

Use the docker exec command to open a shell

Use /bin/bash as the shell to open

💡 Why This Matters

🌍 Real World

Opening a shell inside a Docker container helps developers and system administrators inspect and debug running applications easily.

💼 Career

Knowing how to interact with containers is essential for DevOps roles, cloud engineers, and developers working with containerized applications.

1

Identify the running container

Create a variable called container_name and set it to the string "my_container".

Docker

# Create a variable called container_name with value "my_container"
# Your code here

Need a hint?

Use quotes around the container name string.

2

Prepare the Docker exec command

Create a variable called shell_command and set it to the string "/bin/bash".

Docker

container_name = "my_container"
# Create a variable called shell_command with value "/bin/bash"
# Your code here

Need a hint?

Use quotes around the shell path string.

3

Construct the full Docker exec command

Create a variable called docker_exec_command that uses an f-string to combine docker exec -it, the container_name, and the shell_command. The command should look like docker exec -it my_container /bin/bash.

Docker

container_name = "my_container"
shell_command = "/bin/bash"
# Create docker_exec_command using f-string to combine 'docker exec -it', container_name, and shell_command
# Your code here

Need a hint?

Use an f-string with curly braces around variable names.

4

Print the Docker exec command

Write a print statement to display the value of docker_exec_command.

Docker

container_name = "my_container"
shell_command = "/bin/bash"
docker_exec_command = f"docker exec -it {container_name} {shell_command}"
# Print the docker_exec_command variable
# Your code here

Need a hint?

Use print(docker_exec_command) to show the command.