docker 2

Alyssa must get all Docker question correct on her RHEL-based LFCS exam to have a high probability of pasing. Give a few examples of Docker commands she must have mastered.

Sure, here are some examples of Docker commands that Alyssa should master for the RHEL-based LFCS exam:

1. docker run: This command is used to start a new container from an image and specify runtime options such as port mapping and environment variables. For example, docker run -p 80:8080 -e MYSQL_ROOT_PASSWORD=secret mysql will start a new container from the mysql image, map port 80 of the host to port 8080 of the container, and set the environment variable MYSQL_ROOT_PASSWORD to secret.

2. docker build: This command is used to build a new Docker image from a Dockerfile. For example, docker build -t myapp . will build a new Docker image from the Dockerfile in the current directory and tag it with the name myapp.

3. docker ps: This command is used to list all running containers. For example, docker ps -a will list all containers, including those that are not currently running.

4. docker images: This command is used to list all available Docker images. For example, docker images -q will list only the IDs of the images, while docker images -a will list all images, including intermediate layers.

5. docker stop: This command is used to stop a running container. For example, docker stop mycontainer will stop the container with the name mycontainer.

6. docker rm: This command is used to remove a container. For example, docker rm mycontainer will remove the container with the name mycontainer.

7. docker volume: This command is used to manage Docker volumes. For example, docker volume create myvolume will create a new volume with the name myvolume, while docker volume rm myvolume will remove the volume.

8. docker network: This command is used to manage Docker networks. For example, docker network create mynetwork will create a new network with the name mynetwork, while docker network rm mynetwork will remove the network.

9. docker-compose: This command is used to define and manage multi-container Docker applications using a YAML file. For example, docker-compose up will start all services defined in the docker-compose.yml file, while docker-compose down will stop and remove all containers created by the docker-compose up command.

These are just a few examples of Docker commands that Alyssa should master for the RHEL-based LFCS exam. It's important to note that there are many more commands and options available in Docker, so she should review the Docker documentation and study resources to ensure that she is fully prepared.