Mentor Cloud Devops - docker

Question 1

What is the docker build command

Answer 1

The docker build command builds Docker images from a Dockerfile and a “context”.

Question 2

Build an image from the Dockerfile in the

current directory and tag the image

Answer 2

docker build -t myimage:1.0 .

Question 3

List all images that are locally stored with

the Docker Engine

Answer 3

docker image ls

Question 4

Delete an image from the local image store

Answer 4

docker image rm alpine:3.4

Question 5

References

Answer 5

https: //www.docker.com/sites/default/files/d8/2019-09/docker-cheat-sheet.pdf
https: //dockerlabs.collabnix.com/docker/cheatsheet/
https: //docs.docker.com/engine/reference/commandline/logs/
https: //docs.docker.com/engine/reference/commandline/rm/
https: //dockerlabs.collabnix.com/docker/cheatsheet/
https: //www.freecodecamp.org/news/how-to-remove-images-in-docker/

Question 6

List the running containers

Answer 6

docker container ls –all

Question 7

Delete all running and stopped containers

Answer 7

docker container rm -f $(docker ps -aq)

Question 8

Stop a running container through SIGKILL with name web

Answer 8

docker container kill web

Question 9

Run a container from the Alpine version 3.9
image, name the running container
“web” and expose port 5000 externally,
mapped to port 80 inside the container.

Answer 9

docker container run –name web -p

5000:80 alpine:3.9

Question 10

Remove all images

Answer 10

docker rmi $(docker images -q)

Question 11

run a container and run the bash app so that the container keeps running

Answer 11

docker run -i -t image /bin/bash

Question 12

Connect to a running container

Answer 12

docker exec -it container /bin/bash