CLI

Question 1

How to list running containers?

Answer 1

With command docker ps

Question 2

How to list all containers (running and stopped)?

Answer 2

With command docker ps -a

Question 3

How to build a Docker image from a Dockerfile?

Answer 3

With command docker build -t image_name .

Question 4

How to run a Docker container?

Answer 4

With command docker run container_name

Question 5

How to run a Docker container in the background?

Answer 5

With command docker run -d container_name

Question 6

How to stop a running Docker container?

Answer 6

With command docker stop container_id

Question 7

How to start a stopped Docker container?

Answer 7

With command docker start container_id

Question 8

How to remove a Docker container?

Answer 8

With command docker rm container_id

Question 9

How to force remove a Docker container?

Answer 9

With command docker rm -f container_id

Question 10

How to remove a Docker image?

Answer 10

With command docker rmi image_id

Question 11

How to list all Docker images?

Answer 11

With command docker images

Question 12

How to pull an image from Docker Hub?

Answer 12

With command docker pull image_name

Question 13

How to push an image to Docker Hub?

Answer 13

With command docker push image_name

Question 14

How to tag a Docker image?

Answer 14

With command docker tag source_image target_image

Question 15

How to execute a command in a running container?

Answer 15

With command docker exec container_id command

Question 16

How to view logs of a Docker container?

Answer 16

With command docker logs container_id

Question 17

How to inspect details of a Docker container?

Answer 17

With command docker inspect container_id

Question 18

How to check the resource usage of Docker containers?

Answer 18

With command docker stats

Question 19

How to list Docker networks?

Answer 19

With command docker network ls

Question 20

How to create a Docker network?

Answer 20

With command docker network create network_name

Question 21

How to connect a container to a network?

Answer 21

With command docker network connect network_name container_id

Question 22

How to disconnect a container from a network?

Answer 22

With command docker network disconnect network_name container_id

Question 23

How to list Docker volumes?

Answer 23

With command docker volume ls

Question 24

How to create a Docker volume?

Answer 24

With command docker volume create volume_name

Question 25

How to remove a Docker volume?

Answer 25

With command `docker volume rm volume_name`

Question 26

How to rename a Docker container?

Answer 26

With command `docker rename old_name new_name`

Question 27

How to copy files from host to container?

Answer 27

With command `docker cp host_path container_id:container_path`

Question 28

How to copy files from container to host?

Answer 28

With command `docker cp container_id:container_path host_path`

Question 29

How to attach to a running Docker container?

Answer 29

With command `docker attach container_id`

Question 30

How to stop all running Docker containers?

Answer 30

With command `docker stop $(docker ps -q)`

Question 31

How to remove all stopped Docker containers?

Answer 31

With command `docker rm $(docker ps -a -q)`

Question 32

How to remove all Docker images?

Answer 32

With command `docker rmi $(docker images -q)`

Question 33

How to prune unused Docker objects (containers, images, networks, volumes)?

Answer 33

With command `docker system prune`

Question 34

How to prune unused Docker volumes?

Answer 34

With command `docker volume prune`

Question 35

How to prune unused Docker networks?

Answer 35

With command `docker network prune`

Question 36

How to prune unused Docker images?

Answer 36

With command `docker image prune`

Question 37

How to save a Docker image to a tar file?

Answer 37

With command `docker save -o file_name.tar image_name`

Question 38

How to load a Docker image from a tar file?

Answer 38

With command `docker load -i file_name.tar`

Question 39

How to export a container's filesystem to a tar file?

Answer 39

With command `docker export -o file_name.tar container_id`

Question 40

How to import a container's filesystem from a tar file?

Answer 40

With command `docker import file_name.tar`

Question 41

How to change the restart policy of a Docker container?

Answer 41

With command `docker update --restart=policy container_id`

Question 42

How to view the history of a Docker image?

Answer 42

With command `docker history image_name`

Question 43

How to log in to a Docker registry?

Answer 43

With command `docker login registry_url`

Question 44

How to log out from a Docker registry?

Answer 44

With command `docker logout registry_url`

Question 45

How to set environment variables in a Docker container?

Answer 45

With command `docker run -e ENV_VAR_NAME=value container_name`

Question 46

How to limit CPU usage of a Docker container?

Answer 46

With command `docker run --cpus=number container_name`

Question 47

How to limit memory usage of a Docker container?

Answer 47

With command `docker run --memory=amount container_name`

Question 48

How to restart a running Docker container?

Answer 48

With command `docker restart container_id`

Question 49

How to run a command in a new container and remove it after execution?

Answer 49

With command `docker run --rm container_name command`

Question 50

How to view Docker daemon logs?

Answer 50

With command `docker logs container_id`

Question 51

How to list all Docker containers sorted by creation time?

Answer 51

With command `docker ps --sort=created`

Question 52

How to list the top processes running inside a Docker container?

Answer 52

With command `docker top container_id`

Question 53

How to inspect a Docker image?

Answer 53

With command `docker inspect image_name`

Question 54

How to display real-time events from the Docker daemon?

Answer 54

With command `docker events`

Question 55

How to show the metadata of a Docker volume?

Answer 55

With command `docker volume inspect volume_name`

Question 56

How to create a Docker image from a container's changes?

Answer 56

With command `docker commit container_id new_image_name`

Question 57

How to specify a Dockerfile for building an image?

Answer 57

With command `docker build -f Dockerfile .`

Question 58

How to run a container with a specific name?

Answer 58

With command `docker run --name container_name image_name`