Docker - A Complete Hands-On Guide - Dockerfile Switching Users While Creating Image

The video tutorial covers managing users in Docker, emphasizing the importance of not using the root user by default. It demonstrates creating a Dockerfile, switching to a non-root user, and building Docker containers. The tutorial also explains how to create a new user with specific permissions using OpenSSL, ensuring secure and efficient Docker operations.

Why is it not recommended to use the root user by default in Docker?

• It is not compatible with all systems.

• It is not secure.

• It is too slow.

• It is too complex to manage.

What is the default non-root user available in Docker?

• admin

• guest

• nobody

• user

What command is used to switch to a different user in a Dockerfile?

• SETUSER

• USER

• SWITCH

• CHANGE

What is the purpose of Docker image caching?

• To speed up the build process by reusing layers.

• To store images permanently.

• To increase security.

• To reduce image size.

How can you verify which user is executing commands in a Docker container?

• By using the 'whoami' command.

• By checking the Dockerfile.

• By inspecting the image.

• By running 'docker info'.

Which package is installed to handle user passwords in Docker?

• Bash

• OpenSSL

• Usermod

• Docker CLI

What is the purpose of assigning a user to the root group in Docker?

• To allow the user to install packages.

• To restrict user permissions.

• To prevent the user from accessing certain files.

• To make the user a system administrator.

What command is used to create a new user in a Dockerfile?

• CREATEUSER

• USERADD

• NEWUSER

• ADDUSER

What is the significance of the UID in Docker user creation?

• It sets the user's home directory.

• It specifies the user's unique identifier.

• It determines the user's password.

• It defines the user's shell.

What is the final step to verify a new user in a Docker container?

• Rebuild the Docker image.

• Check the Dockerfile.

• Restart the Docker service.

• Run the container and inspect user permissions.